Bohr Model Calculator
Calculate orbital radius, energy levels, electron velocity, and photon wavelengths for hydrogen-like atoms using the Bohr model of the atom.
Free Nuclear Calculators
6 toolsRadioactive decay, half-life, binding energy, and nuclear reaction calculators. Browse our free nuclear tools below — no sign-up required.
Compton Scattering Calculator
Calculate wavelength shift, scattered photon energy, and recoil kinetic energy for Compton scattering off electrons, protons, or muons.
Heisenberg Uncertainty Principle Calculator
Calculate minimum momentum, velocity, and energy uncertainties from the Heisenberg uncertainty principle for position–momentum and energy–time relations.
Photoelectric Effect Calculator
Calculate maximum kinetic energy, stopping voltage, and threshold wavelength for the photoelectric effect across 12 metals with multiple input modes.
Quantum Number Calculator
Analyze and validate sets of quantum numbers (n, l, mₗ, mₛ), explore subshell capacities, orbital nodes, and generate electron configurations using the Aufbau principle.
Rydberg Equation Calculator
Calculate spectral line wavelengths, photon energies, and wavenumbers using the Rydberg equation for hydrogen and hydrogen-like ions across all spectral series.