Bohr Library is a compact educational Python package that implements the Bohr model for hydrogen and hydrogen-like atoms. It provides simple, well-documented tools to compute electron energy levels (eV), orbital radii (Å), and properties of electronic transitions (ΔE, photon frequency and wavelength). The package also includes utilities to generate visualizations (PNG) of energy levels and electron orbits for teaching and demonstration purposes.

Version: 0.1.0.

The repository contains readable, pedagogical scripts under src/: energy.py (energy-level calculator), radius.py (Bohr radii), transition.py (transition energies and photon properties), and plot_orbits.py (visualizer that saves PNG files). A simple main.py dispatches those scripts via an interactive menu. Several functions are already usable programmatically (for example RadiusCalculator.calculate(...) and ModeloBohrTransiciones.calcular_energia_nivel(...)).

Note: the radius module uses scipy.constants for physical constants. If you plan to install the package from PyPI or use it as a library, ensure scipy is available.

Short-term: keep the code readable and educational, provide a stable programmatic API (non-interactive wrappers), and publish the package on PyPI so users can install it with a single command.

The recommended installation path is via PyPI. Install the package with pip and import the library from your Python scripts. This README provides a single, minimal example showing the PyPI installation method and one short usage snippet.

Install from PyPI:

pip install bohr-library

Single example after installing from PyPI (minimal, non-interactive):

# simple_example.py
# After installing via: pip install bohr-library
from src.transition import ModeloBohrTransiciones
from src.radius import RadiusCalculator


Z = 1 # Hydrogen
n = 1 # ground state


trans = ModeloBohrTransiciones()
energy_ev = trans.calcular_energia_nivel(Z, n)


radius_calc = RadiusCalculator()
radius_A = radius_calc.calculate(Z, n)


print(f"Hydrogen n={n} energy: {energy_ev:.4f} eV")
print(f"Hydrogen n={n} Bohr radius: {radius_A:.4f} Å")

RadiusCalculator.calculate(Z, n) — returns the Bohr radius for a hydrogen-like ion in Angstroms (Å).

ModeloBohrTransiciones.calcular_energia_nivel(Z, n) — returns the energy of level n in electronvolts (eV).

AtomVisualizer.plot_energy_levels(energies, transitions=None, filename=None) — saves an energy-level plot to filename if provided.

AtomVisualizer.plot_orbits(radii, filename=None) — saves an orbit plot to filename if provided.

• Python: >= 3.8
• Required packages: numpy, matplotlib, and scipy (for scipy.constants) — install these before or while installing the package:

pip install numpy matplotlib scipy

• Many scripts use interactive input() calls. For automation and testing, call the non-interactive methods directly (e.g., calculate, calcular_energia_nivel) or add small wrapper functions that accept arguments instead of reading from STDIN.
• Update pyproject.toml to include scipy in dependencies before publishing to PyPI.

The project metadata indicates an MIT license. Contributions are welcome via cloning the repository, creating a branch, and opening a pull request. Suggested improvements: add unit tests, provide non-interactive API wrappers, tidy packaging so installed import paths are consistent, and add documentation pages or notebooks.