[new-unit] Radioactivity property

[balporig]

Description

Radioactivity property

Units to be added

Unit name	Property	Reference to the conversion formula
Becquerel	Radioactivity	Ionizing radiation - Wikipedia
Curie	Radioactivity	Ionizing radiation - Wikipedia
Disintegrations/Min	Radioactivity	Ionizing radiation - Wikipedia
Disintegrations/Sec	Radioactivity	Ionizing radiation - Wikipedia
Gigabecquerel	Radioactivity	Ionizing radiation - Wikipedia
kilobecquerel	Radioactivity	Ionizing radiation - Wikipedia
kilocurie	Radioactivity	Ionizing radiation - Wikipedia
Megabecquerel	Radioactivity	Ionizing radiation - Wikipedia
Microcurie	Radioactivity	Ionizing radiation - Wikipedia
Millibecquerel	Radioactivity	Ionizing radiation - Wikipedia
Millicurie	Radioactivity	Ionizing radiation - Wikipedia
Nanocurie	Radioactivity	Ionizing radiation - Wikipedia
Picocurie	Radioactivity	Ionizing radiation - Wikipedia
Rutherford	Radioactivity	Ionizing radiation - Wikipedia
Terabecquerel	Radioactivity	Ionizing radiation - Wikipedia

[ferraridamiano]

Thank you! Could you also link me the conversion rate between the units? The Wikipedia links you provide doesn't include the conversion formula