Chemical_Elements.rb

cheatsheet do
  title 'Chemical Elements'
  docset_file_name 'Chemical_Elements'
  keyword 'elements'
  source_url 'http://cheat.kapeli.com'
  
  style '
    td.td_notes {
      text-align: center;
    }
    th {
      text-align: center;
    }
  '
  
  category do
    id 'Chemical Elements'
    
    header 'Atomic<br>number'
    header 'Symbol'
    header 'Name'
    header 'Atomic<br>mass'
    header 'State<br>at <a href="https://en.wikipedia.org/wiki/Standard_conditions_for_temperature_and_pressure">STP</a>'
    header 'Density<br>at <a href="https://en.wikipedia.org/wiki/Standard_conditions_for_temperature_and_pressure">STP</a>'
    header 'Discovered'

    entry do
      td_notes '1'
      td_notes 'H'
      td_notes '[hydrogen](https://en.wikipedia.org/wiki/Hydrogen)'
      td_notes '1.00794(4)'
      td_notes 'gas'
      td_notes '0.0000899'
      td_notes '1766'
      index_name 'hydrogen'
      extra_index_name '1'
    end

    entry do
      td_notes '2'
      td_notes 'He'
      td_notes '[helium](https://en.wikipedia.org/wiki/Helium)'
      td_notes '4.002602(2)'
      td_notes 'gas'
      td_notes '0.0001785'
      td_notes '1868'
      index_name 'helium'
      extra_index_name '2'
    end

    entry do
      td_notes '3'
      td_notes 'Li'
      td_notes '[lithium](https://en.wikipedia.org/wiki/Lithium)'
      td_notes '6.941(2)'
      td_notes 'solid'
      td_notes '0.535'
      td_notes '1817'
      index_name 'lithium'
      extra_index_name '3'
    end

    entry do
      td_notes '4'
      td_notes 'Be'
      td_notes '[beryllium](https://en.wikipedia.org/wiki/Beryllium)'
      td_notes '9.012182(3)'
      td_notes 'solid'
      td_notes '1.848'
      td_notes '1798'
      index_name 'beryllium'
      extra_index_name '4'
    end

    entry do
      td_notes '5'
      td_notes 'B'
      td_notes '[boron](https://en.wikipedia.org/wiki/Boron)'
      td_notes '10.811(7)'
      td_notes 'solid'
      td_notes '2.46'
      td_notes '1807'
      index_name 'boron'
      extra_index_name '5'
    end

    entry do
      td_notes '6'
      td_notes 'C'
      td_notes '[carbon](https://en.wikipedia.org/wiki/Carbon)'
      td_notes '12.0107(8)'
      td_notes 'solid'
      td_notes '2.26'
      td_notes 'Ancient'
      index_name 'carbon'
      extra_index_name '6'
    end

    entry do
      td_notes '7'
      td_notes 'N'
      td_notes '[nitrogen](https://en.wikipedia.org/wiki/Nitrogen)'
      td_notes '14.0067(2)'
      td_notes 'gas'
      td_notes '0.001251'
      td_notes '1772'
      index_name 'nitrogen'
      extra_index_name '7'
    end

    entry do
      td_notes '8'
      td_notes 'O'
      td_notes '[oxygen](https://en.wikipedia.org/wiki/Oxygen)'
      td_notes '15.9994(3)'
      td_notes 'gas'
      td_notes '0.001429'
      td_notes '1774'
      index_name 'oxygen'
      extra_index_name '8'
    end

    entry do
      td_notes '9'
      td_notes 'F'
      td_notes '[fluorine](https://en.wikipedia.org/wiki/Fluorine)'
      td_notes '18.9984032(5)'
      td_notes 'gas'
      td_notes '0.001696'
      td_notes '1670'
      index_name 'fluorine'
      extra_index_name '9'
    end

    entry do
      td_notes '10'
      td_notes 'Ne'
      td_notes '[neon](https://en.wikipedia.org/wiki/Neon)'
      td_notes '20.1797(6)'
      td_notes 'gas'
      td_notes '0.0009'
      td_notes '1898'
      index_name 'neon'
      extra_index_name '10'
    end

    entry do
      td_notes '11'
      td_notes 'Na'
      td_notes '[sodium](https://en.wikipedia.org/wiki/Sodium)'
      td_notes '22.98976928(2)'
      td_notes 'solid'
      td_notes '0.968'
      td_notes '1807'
      index_name 'sodium'
      extra_index_name '11'
    end

    entry do
      td_notes '12'
      td_notes 'Mg'
      td_notes '[magnesium](https://en.wikipedia.org/wiki/Magnesium)'
      td_notes '24.3050(6)'
      td_notes 'solid'
      td_notes '1.738'
      td_notes '1808'
      index_name 'magnesium'
      extra_index_name '12'
    end

    entry do
      td_notes '13'
      td_notes 'Al'
      td_notes '[aluminum](https://en.wikipedia.org/wiki/Aluminum)'
      td_notes '26.9815386(8)'
      td_notes 'solid'
      td_notes '2.7'
      td_notes 'Ancient'
      index_name 'aluminum'
      extra_index_name '13'
    end

    entry do
      td_notes '14'
      td_notes 'Si'
      td_notes '[silicon](https://en.wikipedia.org/wiki/Silicon)'
      td_notes '28.0855(3)'
      td_notes 'solid'
      td_notes '2.33'
      td_notes '1854'
      index_name 'silicon'
      extra_index_name '14'
    end

    entry do
      td_notes '15'
      td_notes 'P'
      td_notes '[phosphorus](https://en.wikipedia.org/wiki/Phosphorus)'
      td_notes '30.973762(2)'
      td_notes 'solid'
      td_notes '1.823'
      td_notes '1669'
      index_name 'phosphorus'
      extra_index_name '15'
    end

    entry do
      td_notes '16'
      td_notes 'S'
      td_notes '[sulfur](https://en.wikipedia.org/wiki/Sulfur)'
      td_notes '32.065(5)'
      td_notes 'solid'
      td_notes '1.96'
      td_notes 'Ancient'
      index_name 'sulfur'
      extra_index_name '16'
    end

    entry do
      td_notes '17'
      td_notes 'Cl'
      td_notes '[chlorine](https://en.wikipedia.org/wiki/Chlorine)'
      td_notes '35.453(2)'
      td_notes 'gas'
      td_notes '0.003214'
      td_notes '1774'
      index_name 'chlorine'
      extra_index_name '17'
    end

    entry do
      td_notes '18'
      td_notes 'Ar'
      td_notes '[argon](https://en.wikipedia.org/wiki/Argon)'
      td_notes '39.948(1)'
      td_notes 'gas'
      td_notes '0.001784'
      td_notes '1894'
      index_name 'argon'
      extra_index_name '18'
    end

    entry do
      td_notes '19'
      td_notes 'K'
      td_notes '[potassium](https://en.wikipedia.org/wiki/Potassium)'
      td_notes '39.0983(1)'
      td_notes 'solid'
      td_notes '0.856'
      td_notes '1807'
      index_name 'potassium'
      extra_index_name '19'
    end

    entry do
      td_notes '20'
      td_notes 'Ca'
      td_notes '[calcium](https://en.wikipedia.org/wiki/Calcium)'
      td_notes '40.078(4)'
      td_notes 'solid'
      td_notes '1.55'
      td_notes 'Ancient'
      index_name 'calcium'
      extra_index_name '20'
    end

    entry do
      td_notes '21'
      td_notes 'Sc'
      td_notes '[scandium](https://en.wikipedia.org/wiki/Scandium)'
      td_notes '44.955912(6)'
      td_notes 'solid'
      td_notes '2.985'
      td_notes '1876'
      index_name 'scandium'
      extra_index_name '21'
    end

    entry do
      td_notes '22'
      td_notes 'Ti'
      td_notes '[titanium](https://en.wikipedia.org/wiki/Titanium)'
      td_notes '47.867(1)'
      td_notes 'solid'
      td_notes '4.507'
      td_notes '1791'
      index_name 'titanium'
      extra_index_name '22'
    end

    entry do
      td_notes '23'
      td_notes 'V'
      td_notes '[vanadium](https://en.wikipedia.org/wiki/Vanadium)'
      td_notes '50.9415(1)'
      td_notes 'solid'
      td_notes '6.11'
      td_notes '1803'
      index_name 'vanadium'
      extra_index_name '23'
    end

    entry do
      td_notes '24'
      td_notes 'Cr'
      td_notes '[chromium](https://en.wikipedia.org/wiki/Chromium)'
      td_notes '51.9961(6)'
      td_notes 'solid'
      td_notes '7.14'
      td_notes 'Ancient'
      index_name 'chromium'
      extra_index_name '24'
    end

    entry do
      td_notes '25'
      td_notes 'Mn'
      td_notes '[manganese](https://en.wikipedia.org/wiki/Manganese)'
      td_notes '54.938045(5)'
      td_notes 'solid'
      td_notes '7.47'
      td_notes '1774'
      index_name 'manganese'
      extra_index_name '25'
    end

    entry do
      td_notes '26'
      td_notes 'Fe'
      td_notes '[iron](https://en.wikipedia.org/wiki/Iron)'
      td_notes '55.845(2)'
      td_notes 'solid'
      td_notes '7.874'
      td_notes 'Ancient'
      index_name 'iron'
      extra_index_name '26'
    end

    entry do
      td_notes '27'
      td_notes 'Co'
      td_notes '[cobalt](https://en.wikipedia.org/wiki/Cobalt)'
      td_notes '58.933195(5)'
      td_notes 'solid'
      td_notes '8.9'
      td_notes 'Ancient'
      index_name 'cobalt'
      extra_index_name '27'
    end

    entry do
      td_notes '28'
      td_notes 'Ni'
      td_notes '[nickel](https://en.wikipedia.org/wiki/Nickel)'
      td_notes '58.6934(4)'
      td_notes 'solid'
      td_notes '8.908'
      td_notes '1751'
      index_name 'nickel'
      extra_index_name '28'
    end

    entry do
      td_notes '29'
      td_notes 'Cu'
      td_notes '[copper](https://en.wikipedia.org/wiki/Copper)'
      td_notes '63.546(3)'
      td_notes 'solid'
      td_notes '8.92'
      td_notes 'Ancient'
      index_name 'copper'
      extra_index_name '29'
    end

    entry do
      td_notes '30'
      td_notes 'Zn'
      td_notes '[zinc](https://en.wikipedia.org/wiki/Zinc)'
      td_notes '65.38(2)'
      td_notes 'solid'
      td_notes '7.14'
      td_notes '1746'
      index_name 'zinc'
      extra_index_name '30'
    end

    entry do
      td_notes '31'
      td_notes 'Ga'
      td_notes '[gallium](https://en.wikipedia.org/wiki/Gallium)'
      td_notes '69.723(1)'
      td_notes 'solid'
      td_notes '5.904'
      td_notes '1875'
      index_name 'gallium'
      extra_index_name '31'
    end

    entry do
      td_notes '32'
      td_notes 'Ge'
      td_notes '[germanium](https://en.wikipedia.org/wiki/Germanium)'
      td_notes '72.64(1)'
      td_notes 'solid'
      td_notes '5.323'
      td_notes '1886'
      index_name 'germanium'
      extra_index_name '32'
    end

    entry do
      td_notes '33'
      td_notes 'As'
      td_notes '[arsenic](https://en.wikipedia.org/wiki/Arsenic)'
      td_notes '74.92160(2)'
      td_notes 'solid'
      td_notes '5.727'
      td_notes 'Ancient'
      index_name 'arsenic'
      extra_index_name '33'
    end

    entry do
      td_notes '34'
      td_notes 'Se'
      td_notes '[selenium](https://en.wikipedia.org/wiki/Selenium)'
      td_notes '78.96(3)'
      td_notes 'solid'
      td_notes '4.819'
      td_notes '1817'
      index_name 'selenium'
      extra_index_name '34'
    end

    entry do
      td_notes '35'
      td_notes 'Br'
      td_notes '[bromine](https://en.wikipedia.org/wiki/Bromine)'
      td_notes '79.904(1)'
      td_notes 'liquid'
      td_notes '3.12'
      td_notes '1826'
      index_name 'bromine'
      extra_index_name '35'
    end

    entry do
      td_notes '36'
      td_notes 'Kr'
      td_notes '[krypton](https://en.wikipedia.org/wiki/Krypton)'
      td_notes '83.798(2)'
      td_notes 'gas'
      td_notes '0.00375'
      td_notes '1898'
      index_name 'krypton'
      extra_index_name '36'
    end

    entry do
      td_notes '37'
      td_notes 'Rb'
      td_notes '[rubidium](https://en.wikipedia.org/wiki/Rubidium)'
      td_notes '85.4678(3)'
      td_notes 'solid'
      td_notes '1.532'
      td_notes '1861'
      index_name 'rubidium'
      extra_index_name '37'
    end

    entry do
      td_notes '38'
      td_notes 'Sr'
      td_notes '[strontium](https://en.wikipedia.org/wiki/Strontium)'
      td_notes '87.62(1)'
      td_notes 'solid'
      td_notes '2.63'
      td_notes '1790'
      index_name 'strontium'
      extra_index_name '38'
    end

    entry do
      td_notes '39'
      td_notes 'Y'
      td_notes '[yttrium](https://en.wikipedia.org/wiki/Yttrium)'
      td_notes '88.90585(2)'
      td_notes 'solid'
      td_notes '4.472'
      td_notes '1794'
      index_name 'yttrium'
      extra_index_name '39'
    end

    entry do
      td_notes '40'
      td_notes 'Zr'
      td_notes '[zirconium](https://en.wikipedia.org/wiki/Zirconium)'
      td_notes '91.224(2)'
      td_notes 'solid'
      td_notes '6.511'
      td_notes '1789'
      index_name 'zirconium'
      extra_index_name '40'
    end

    entry do
      td_notes '41'
      td_notes 'Nb'
      td_notes '[niobium](https://en.wikipedia.org/wiki/Niobium)'
      td_notes '92.90638(2)'
      td_notes 'solid'
      td_notes '8.57'
      td_notes '1801'
      index_name 'niobium'
      extra_index_name '41'
    end

    entry do
      td_notes '42'
      td_notes 'Mo'
      td_notes '[molybdenum](https://en.wikipedia.org/wiki/Molybdenum)'
      td_notes '95.96(2)'
      td_notes 'solid'
      td_notes '10.28'
      td_notes '1778'
      index_name 'molybdenum'
      extra_index_name '42'
    end

    entry do
      td_notes '43'
      td_notes 'Tc'
      td_notes '[technetium](https://en.wikipedia.org/wiki/Technetium)'
      td_notes '[98]'
      td_notes 'solid'
      td_notes '11.5'
      td_notes '1937'
      index_name 'technetium'
      extra_index_name '43'
    end

    entry do
      td_notes '44'
      td_notes 'Ru'
      td_notes '[ruthenium](https://en.wikipedia.org/wiki/Ruthenium)'
      td_notes '101.07(2)'
      td_notes 'solid'
      td_notes '12.37'
      td_notes '1827'
      index_name 'ruthenium'
      extra_index_name '44'
    end

    entry do
      td_notes '45'
      td_notes 'Rh'
      td_notes '[rhodium](https://en.wikipedia.org/wiki/Rhodium)'
      td_notes '102.90550(2)'
      td_notes 'solid'
      td_notes '12.45'
      td_notes '1803'
      index_name 'rhodium'
      extra_index_name '45'
    end

    entry do
      td_notes '46'
      td_notes 'Pd'
      td_notes '[palladium](https://en.wikipedia.org/wiki/Palladium)'
      td_notes '106.42(1)'
      td_notes 'solid'
      td_notes '12.023'
      td_notes '1803'
      index_name 'palladium'
      extra_index_name '46'
    end

    entry do
      td_notes '47'
      td_notes 'Ag'
      td_notes '[silver](https://en.wikipedia.org/wiki/Silver)'
      td_notes '107.8682(2)'
      td_notes 'solid'
      td_notes '10.49'
      td_notes 'Ancient'
      index_name 'silver'
      extra_index_name '47'
    end

    entry do
      td_notes '48'
      td_notes 'Cd'
      td_notes '[cadmium](https://en.wikipedia.org/wiki/Cadmium)'
      td_notes '112.411(8)'
      td_notes 'solid'
      td_notes '8.65'
      td_notes '1817'
      index_name 'cadmium'
      extra_index_name '48'
    end

    entry do
      td_notes '49'
      td_notes 'In'
      td_notes '[indium](https://en.wikipedia.org/wiki/Indium)'
      td_notes '114.818(3)'
      td_notes 'solid'
      td_notes '7.31'
      td_notes '1863'
      index_name 'indium'
      extra_index_name '49'
    end

    entry do
      td_notes '50'
      td_notes 'Sn'
      td_notes '[tin](https://en.wikipedia.org/wiki/Tin)'
      td_notes '118.710(7)'
      td_notes 'solid'
      td_notes '7.31'
      td_notes 'Ancient'
      index_name 'tin'
      extra_index_name '50'
    end

    entry do
      td_notes '51'
      td_notes 'Sb'
      td_notes '[antimony](https://en.wikipedia.org/wiki/Antimony)'
      td_notes '121.760(1)'
      td_notes 'solid'
      td_notes '6.697'
      td_notes 'Ancient'
      index_name 'antimony'
      extra_index_name '51'
    end

    entry do
      td_notes '52'
      td_notes 'Te'
      td_notes '[tellurium](https://en.wikipedia.org/wiki/Tellurium)'
      td_notes '127.60(3)'
      td_notes 'solid'
      td_notes '6.24'
      td_notes '1782'
      index_name 'tellurium'
      extra_index_name '52'
    end

    entry do
      td_notes '53'
      td_notes 'I'
      td_notes '[iodine](https://en.wikipedia.org/wiki/Iodine)'
      td_notes '126.90447(3)'
      td_notes 'solid'
      td_notes '4.94'
      td_notes '1811'
      index_name 'iodine'
      extra_index_name '53'
    end

    entry do
      td_notes '54'
      td_notes 'Xe'
      td_notes '[xenon](https://en.wikipedia.org/wiki/Xenon)'
      td_notes '131.293(6)'
      td_notes 'gas'
      td_notes '0.0059'
      td_notes '1898'
      index_name 'xenon'
      extra_index_name '54'
    end

    entry do
      td_notes '55'
      td_notes 'Cs'
      td_notes '[cesium](https://en.wikipedia.org/wiki/Cesium)'
      td_notes '132.9054519(2)'
      td_notes 'solid'
      td_notes '1.879'
      td_notes '1860'
      index_name 'cesium'
      extra_index_name '55'
    end

    entry do
      td_notes '56'
      td_notes 'Ba'
      td_notes '[barium](https://en.wikipedia.org/wiki/Barium)'
      td_notes '137.327(7)'
      td_notes 'solid'
      td_notes '3.51'
      td_notes '1808'
      index_name 'barium'
      extra_index_name '56'
    end

    entry do
      td_notes '57'
      td_notes 'La'
      td_notes '[lanthanum](https://en.wikipedia.org/wiki/Lanthanum)'
      td_notes '138.90547(7)'
      td_notes 'solid'
      td_notes '6.146'
      td_notes '1839'
      index_name 'lanthanum'
      extra_index_name '57'
    end

    entry do
      td_notes '58'
      td_notes 'Ce'
      td_notes '[cerium](https://en.wikipedia.org/wiki/Cerium)'
      td_notes '140.116(1)'
      td_notes 'solid'
      td_notes '6.689'
      td_notes '1803'
      index_name 'cerium'
      extra_index_name '58'
    end

    entry do
      td_notes '59'
      td_notes 'Pr'
      td_notes '[praseodymium](https://en.wikipedia.org/wiki/Praseodymium)'
      td_notes '140.90765(2)'
      td_notes 'solid'
      td_notes '6.64'
      td_notes '1885'
      index_name 'praseodymium'
      extra_index_name '59'
    end

    entry do
      td_notes '60'
      td_notes 'Nd'
      td_notes '[neodymium](https://en.wikipedia.org/wiki/Neodymium)'
      td_notes '144.242(3)'
      td_notes 'solid'
      td_notes '7.01'
      td_notes '1885'
      index_name 'neodymium'
      extra_index_name '60'
    end

    entry do
      td_notes '61'
      td_notes 'Pm'
      td_notes '[promethium](https://en.wikipedia.org/wiki/Promethium)'
      td_notes '[145]'
      td_notes 'solid'
      td_notes '7.264'
      td_notes '1947'
      index_name 'promethium'
      extra_index_name '61'
    end

    entry do
      td_notes '62'
      td_notes 'Sm'
      td_notes '[samarium](https://en.wikipedia.org/wiki/Samarium)'
      td_notes '150.36(2)'
      td_notes 'solid'
      td_notes '7.353'
      td_notes '1853'
      index_name 'samarium'
      extra_index_name '62'
    end

    entry do
      td_notes '63'
      td_notes 'Eu'
      td_notes '[europium](https://en.wikipedia.org/wiki/Europium)'
      td_notes '151.964(1)'
      td_notes 'solid'
      td_notes '5.244'
      td_notes '1901'
      index_name 'europium'
      extra_index_name '63'
    end

    entry do
      td_notes '64'
      td_notes 'Gd'
      td_notes '[gadolinium](https://en.wikipedia.org/wiki/Gadolinium)'
      td_notes '157.25(3)'
      td_notes 'solid'
      td_notes '7.901'
      td_notes '1880'
      index_name 'gadolinium'
      extra_index_name '64'
    end

    entry do
      td_notes '65'
      td_notes 'Tb'
      td_notes '[terbium](https://en.wikipedia.org/wiki/Terbium)'
      td_notes '158.92535(2)'
      td_notes 'solid'
      td_notes '8.219'
      td_notes '1843'
      index_name 'terbium'
      extra_index_name '65'
    end

    entry do
      td_notes '66'
      td_notes 'Dy'
      td_notes '[dysprosium](https://en.wikipedia.org/wiki/Dysprosium)'
      td_notes '162.500(1)'
      td_notes 'solid'
      td_notes '8.551'
      td_notes '1886'
      index_name 'dysprosium'
      extra_index_name '66'
    end

    entry do
      td_notes '67'
      td_notes 'Ho'
      td_notes '[holmium](https://en.wikipedia.org/wiki/Holmium)'
      td_notes '164.93032(2)'
      td_notes 'solid'
      td_notes '8.795'
      td_notes '1878'
      index_name 'holmium'
      extra_index_name '67'
    end

    entry do
      td_notes '68'
      td_notes 'Er'
      td_notes '[erbium](https://en.wikipedia.org/wiki/Erbium)'
      td_notes '167.259(3)'
      td_notes 'solid'
      td_notes '9.066'
      td_notes '1842'
      index_name 'erbium'
      extra_index_name '68'
    end

    entry do
      td_notes '69'
      td_notes 'Tm'
      td_notes '[thulium](https://en.wikipedia.org/wiki/Thulium)'
      td_notes '168.93421(2)'
      td_notes 'solid'
      td_notes '9.321'
      td_notes '1879'
      index_name 'thulium'
      extra_index_name '69'
    end

    entry do
      td_notes '70'
      td_notes 'Yb'
      td_notes '[ytterbium](https://en.wikipedia.org/wiki/Ytterbium)'
      td_notes '173.054(5)'
      td_notes 'solid'
      td_notes '6.57'
      td_notes '1878'
      index_name 'ytterbium'
      extra_index_name '70'
    end

    entry do
      td_notes '71'
      td_notes 'Lu'
      td_notes '[lutetium](https://en.wikipedia.org/wiki/Lutetium)'
      td_notes '174.9668(1)'
      td_notes 'solid'
      td_notes '9.841'
      td_notes '1907'
      index_name 'lutetium'
      extra_index_name '71'
    end

    entry do
      td_notes '72'
      td_notes 'Hf'
      td_notes '[hafnium](https://en.wikipedia.org/wiki/Hafnium)'
      td_notes '178.49(2)'
      td_notes 'solid'
      td_notes '13.31'
      td_notes '1923'
      index_name 'hafnium'
      extra_index_name '72'
    end

    entry do
      td_notes '73'
      td_notes 'Ta'
      td_notes '[tantalum](https://en.wikipedia.org/wiki/Tantalum)'
      td_notes '180.94788(2)'
      td_notes 'solid'
      td_notes '16.65'
      td_notes '1802'
      index_name 'tantalum'
      extra_index_name '73'
    end

    entry do
      td_notes '74'
      td_notes 'W'
      td_notes '[tungsten](https://en.wikipedia.org/wiki/Tungsten)'
      td_notes '183.84(1)'
      td_notes 'solid'
      td_notes '19.25'
      td_notes '1783'
      index_name 'tungsten'
      extra_index_name '74'
    end

    entry do
      td_notes '75'
      td_notes 'Re'
      td_notes '[rhenium](https://en.wikipedia.org/wiki/Rhenium)'
      td_notes '186.207(1)'
      td_notes 'solid'
      td_notes '21.02'
      td_notes '1925'
      index_name 'rhenium'
      extra_index_name '75'
    end

    entry do
      td_notes '76'
      td_notes 'Os'
      td_notes '[osmium](https://en.wikipedia.org/wiki/Osmium)'
      td_notes '190.23(3)'
      td_notes 'solid'
      td_notes '22.61'
      td_notes '1803'
      index_name 'osmium'
      extra_index_name '76'
    end

    entry do
      td_notes '77'
      td_notes 'Ir'
      td_notes '[iridium](https://en.wikipedia.org/wiki/Iridium)'
      td_notes '192.217(3)'
      td_notes 'solid'
      td_notes '22.65'
      td_notes '1803'
      index_name 'iridium'
      extra_index_name '77'
    end

    entry do
      td_notes '78'
      td_notes 'Pt'
      td_notes '[platinum](https://en.wikipedia.org/wiki/Platinum)'
      td_notes '195.084(9)'
      td_notes 'solid'
      td_notes '21.09'
      td_notes 'Ancient'
      index_name 'platinum'
      extra_index_name '78'
    end

    entry do
      td_notes '79'
      td_notes 'Au'
      td_notes '[gold](https://en.wikipedia.org/wiki/Gold)'
      td_notes '196.966569(4)'
      td_notes 'solid'
      td_notes '19.3'
      td_notes 'Ancient'
      index_name 'gold'
      extra_index_name '79'
    end

    entry do
      td_notes '80'
      td_notes 'Hg'
      td_notes '[mercury](https://en.wikipedia.org/wiki/Mercury)'
      td_notes '200.59(2)'
      td_notes 'liquid'
      td_notes '13.534'
      td_notes 'Ancient'
      index_name 'mercury'
      extra_index_name '80'
    end

    entry do
      td_notes '81'
      td_notes 'Tl'
      td_notes '[thallium](https://en.wikipedia.org/wiki/Thallium)'
      td_notes '204.3833(2)'
      td_notes 'solid'
      td_notes '11.85'
      td_notes '1861'
      index_name 'thallium'
      extra_index_name '81'
    end

    entry do
      td_notes '82'
      td_notes 'Pb'
      td_notes '[lead](https://en.wikipedia.org/wiki/Lead)'
      td_notes '207.2(1)'
      td_notes 'solid'
      td_notes '11.34'
      td_notes 'Ancient'
      index_name 'lead'
      extra_index_name '82'
    end

    entry do
      td_notes '83'
      td_notes 'Bi'
      td_notes '[bismuth](https://en.wikipedia.org/wiki/Bismuth)'
      td_notes '208.98040(1)'
      td_notes 'solid'
      td_notes '9.78'
      td_notes 'Ancient'
      index_name 'bismuth'
      extra_index_name '83'
    end

    entry do
      td_notes '84'
      td_notes 'Po'
      td_notes '[polonium](https://en.wikipedia.org/wiki/Polonium)'
      td_notes '[209]'
      td_notes 'solid'
      td_notes '9.196'
      td_notes '1898'
      index_name 'polonium'
      extra_index_name '84'
    end

    entry do
      td_notes '85'
      td_notes 'At'
      td_notes '[astatine](https://en.wikipedia.org/wiki/Astatine)'
      td_notes '[210]'
      td_notes 'solid'
      td_notes '(unknown)'
      td_notes '1940'
      index_name 'astatine'
      extra_index_name '85'
    end

    entry do
      td_notes '86'
      td_notes 'Rn'
      td_notes '[radon](https://en.wikipedia.org/wiki/Radon)'
      td_notes '[222]'
      td_notes 'gas'
      td_notes '0.00973'
      td_notes '1900'
      index_name 'radon'
      extra_index_name '86'
    end

    entry do
      td_notes '87'
      td_notes 'Fr'
      td_notes '[francium](https://en.wikipedia.org/wiki/Francium)'
      td_notes '[223]'
      td_notes 'solid'
      td_notes '(unknown)'
      td_notes '1939'
      index_name 'francium'
      extra_index_name '87'
    end

    entry do
      td_notes '88'
      td_notes 'Ra'
      td_notes '[radium](https://en.wikipedia.org/wiki/Radium)'
      td_notes '[226]'
      td_notes 'solid'
      td_notes '5'
      td_notes '1898'
      index_name 'radium'
      extra_index_name '88'
    end

    entry do
      td_notes '89'
      td_notes 'Ac'
      td_notes '[actinium](https://en.wikipedia.org/wiki/Actinium)'
      td_notes '[227]'
      td_notes 'solid'
      td_notes '10.07'
      td_notes '1899'
      index_name 'actinium'
      extra_index_name '89'
    end

    entry do
      td_notes '90'
      td_notes 'Th'
      td_notes '[thorium](https://en.wikipedia.org/wiki/Thorium)'
      td_notes '232.03806(2)'
      td_notes 'solid'
      td_notes '11.724'
      td_notes '1828'
      index_name 'thorium'
      extra_index_name '90'
    end

    entry do
      td_notes '91'
      td_notes 'Pa'
      td_notes '[protactinium](https://en.wikipedia.org/wiki/Protactinium)'
      td_notes '231.03588(2)'
      td_notes 'solid'
      td_notes '15.37'
      td_notes '1913'
      index_name 'protactinium'
      extra_index_name '91'
    end

    entry do
      td_notes '92'
      td_notes 'U'
      td_notes '[uranium](https://en.wikipedia.org/wiki/Uranium)'
      td_notes '238.02891(3)'
      td_notes 'solid'
      td_notes '19.05'
      td_notes '1789'
      index_name 'uranium'
      extra_index_name '92'
    end

    entry do
      td_notes '93'
      td_notes 'Np'
      td_notes '[neptunium](https://en.wikipedia.org/wiki/Neptunium)'
      td_notes '[237]'
      td_notes 'solid'
      td_notes '20.45'
      td_notes '1940'
      index_name 'neptunium'
      extra_index_name '93'
    end

    entry do
      td_notes '94'
      td_notes 'Pu'
      td_notes '[plutonium](https://en.wikipedia.org/wiki/Plutonium)'
      td_notes '[244]'
      td_notes 'solid'
      td_notes '19.816'
      td_notes '1940'
      index_name 'plutonium'
      extra_index_name '94'
    end

    entry do
      td_notes '95'
      td_notes 'Am'
      td_notes '[americium](https://en.wikipedia.org/wiki/Americium)'
      td_notes '[243]'
      td_notes 'solid'
      td_notes '(unknown)'
      td_notes '1944'
      index_name 'americium'
      extra_index_name '95'
    end

    entry do
      td_notes '96'
      td_notes 'Cm'
      td_notes '[curium](https://en.wikipedia.org/wiki/Curium)'
      td_notes '[247]'
      td_notes 'solid'
      td_notes '13.51'
      td_notes '1944'
      index_name 'curium'
      extra_index_name '96'
    end

    entry do
      td_notes '97'
      td_notes 'Bk'
      td_notes '[berkelium](https://en.wikipedia.org/wiki/Berkelium)'
      td_notes '[247]'
      td_notes 'solid'
      td_notes '14.78'
      td_notes '1949'
      index_name 'berkelium'
      extra_index_name '97'
    end

    entry do
      td_notes '98'
      td_notes 'Cf'
      td_notes '[californium](https://en.wikipedia.org/wiki/Californium)'
      td_notes '[251]'
      td_notes 'solid'
      td_notes '15.1'
      td_notes '1950'
      index_name 'californium'
      extra_index_name '98'
    end

    entry do
      td_notes '99'
      td_notes 'Es'
      td_notes '[einsteinium](https://en.wikipedia.org/wiki/Einsteinium)'
      td_notes '[252]'
      td_notes 'solid'
      td_notes '(unknown)'
      td_notes '1952'
      index_name 'einsteinium'
      extra_index_name '99'
    end

    entry do
      td_notes '100'
      td_notes 'Fm'
      td_notes '[fermium](https://en.wikipedia.org/wiki/Fermium)'
      td_notes '[257]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1952'
      index_name 'fermium'
      extra_index_name '100'
    end

    entry do
      td_notes '101'
      td_notes 'Md'
      td_notes '[mendelevium](https://en.wikipedia.org/wiki/Mendelevium)'
      td_notes '[258]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1955'
      index_name 'mendelevium'
      extra_index_name '101'
    end

    entry do
      td_notes '102'
      td_notes 'No'
      td_notes '[nobelium](https://en.wikipedia.org/wiki/Nobelium)'
      td_notes '[259]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1957'
      index_name 'nobelium'
      extra_index_name '102'
    end

    entry do
      td_notes '103'
      td_notes 'Lr'
      td_notes '[lawrencium](https://en.wikipedia.org/wiki/Lawrencium)'
      td_notes '[262]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1961'
      index_name 'lawrencium'
      extra_index_name '103'
    end

    entry do
      td_notes '104'
      td_notes 'Rf'
      td_notes '[rutherfordium](https://en.wikipedia.org/wiki/Rutherfordium)'
      td_notes '[267]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1969'
      index_name 'rutherfordium'
      extra_index_name '104'
    end

    entry do
      td_notes '105'
      td_notes 'Db'
      td_notes '[dubnium](https://en.wikipedia.org/wiki/Dubnium)'
      td_notes '[268]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1967'
      index_name 'dubnium'
      extra_index_name '105'
    end

    entry do
      td_notes '106'
      td_notes 'Sg'
      td_notes '[seaborgium](https://en.wikipedia.org/wiki/Seaborgium)'
      td_notes '[271]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1974'
      index_name 'seaborgium'
      extra_index_name '106'
    end

    entry do
      td_notes '107'
      td_notes 'Bh'
      td_notes '[bohrium](https://en.wikipedia.org/wiki/Bohrium)'
      td_notes '[272]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1976'
      index_name 'bohrium'
      extra_index_name '107'
    end

    entry do
      td_notes '108'
      td_notes 'Hs'
      td_notes '[hassium](https://en.wikipedia.org/wiki/Hassium)'
      td_notes '[270]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1984'
      index_name 'hassium'
      extra_index_name '108'
    end

    entry do
      td_notes '109'
      td_notes 'Mt'
      td_notes '[meitnerium](https://en.wikipedia.org/wiki/Meitnerium)'
      td_notes '[276]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1982'
      index_name 'meitnerium'
      extra_index_name '109'
    end

    entry do
      td_notes '110'
      td_notes 'Ds'
      td_notes '[darmstadtium](https://en.wikipedia.org/wiki/Darmstadtium)'
      td_notes '[281]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1994'
      index_name 'darmstadtium'
      extra_index_name '110'
    end

    entry do
      td_notes '111'
      td_notes 'Rg'
      td_notes '[roentgenium](https://en.wikipedia.org/wiki/Roentgenium)'
      td_notes '[280]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1994'
      index_name 'roentgenium'
      extra_index_name '111'
    end

    entry do
      td_notes '112'
      td_notes 'Cn'
      td_notes '[copernicium](https://en.wikipedia.org/wiki/Copernicium)'
      td_notes '[285]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1996'
      index_name 'copernicium'
      extra_index_name '112'
    end

    entry do
      td_notes '113'
      td_notes 'Nh'
      td_notes '[nihonium](https://en.wikipedia.org/wiki/Nihonium)'
      td_notes '[284]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '2003'
      index_name 'nihonium'
      extra_index_name '113'
    end

    entry do
      td_notes '114'
      td_notes 'Fl'
      td_notes '[flerovium](https://en.wikipedia.org/wiki/Flerovium)'
      td_notes '[289]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '1998'
      index_name 'flerovium'
      extra_index_name '114'
    end

    entry do
      td_notes '115'
      td_notes 'Mc'
      td_notes '[moscovium](https://en.wikipedia.org/wiki/Moscovium)'
      td_notes '[288]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '2003'
      index_name 'moscovium'
      extra_index_name '115'
    end

    entry do
      td_notes '116'
      td_notes 'Lv'
      td_notes '[livermorium](https://en.wikipedia.org/wiki/Livermorium)'
      td_notes '[293]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '2000'
      index_name 'livermorium'
      extra_index_name '116'
    end

    entry do
      td_notes '117'
      td_notes 'Ts'
      td_notes '[tennessine](https://en.wikipedia.org/wiki/Tennessine)'
      td_notes '[294]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '2010'
      index_name 'tennessine'
      extra_index_name '117'
    end

    entry do
      td_notes '118'
      td_notes 'Og'
      td_notes '[oganesson](https://en.wikipedia.org/wiki/Oganesson)'
      td_notes '[294]'
      td_notes '(unknown)'
      td_notes '(unknown)'
      td_notes '2002'
      index_name 'oganesson'
      extra_index_name '118'
    end

  end
    notes "
        * Based on period table data by [Chris Andrejewski](https://github.com/andrejewski/periodic-table)
        * Converted by [Daniel Griscom](http://suitable.com)
    "
    
end