Fundamental constants

periodictable.constants

Various fundamental constants.

periodictable.constants.atomic_mass_constant = 1.66053906892e-27

atomic mass constant (kg / u) [CODATA 2022]

periodictable.constants.avogadro_number = 6.02214076e+23

Avogadro’s number (mol^-1) [CODATA 2022]

periodictable.constants.electron_mass = 0.0005485799090441

electron mass (u) [CODATA 2022]

periodictable.constants.electron_radius = 2.8179403205e-15

electron radius r_e (m) [CODATA 2022]

periodictable.constants.electron_volt = 1.602176634e-19

Electron volt (J/eV) [CODATA 2022]

periodictable.constants.neutron_mass = 1.00866491606

neutron mass (u) [CODATA 2022]

periodictable.constants.planck_constant = 6.62607015e-34

Planck constant (eV s) [CODATA 2022]

periodictable.constants.speed_of_light = 299792458

speed of light c (m/s) [CODATA 2022]