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Physical constant

Elementary Charge

The electric charge of a single proton.

e = 1.602176×10⁻¹⁹ C

Other constants

Speed of Light Gravitational Constant Planck Constant Reduced Planck Constant Boltzmann Constant Avogadro Constant Gas Constant Vacuum Permittivity Vacuum Permeability Electron Mass Proton Mass Stefan–Boltzmann Constant