Avogadro’s number, N = × 6.02 1023 mol−1 0 Universal gas constant, R = ⋅ 8.31 J (mol K) Boltzmann’s constant, k = × 1.38 10−23 B J K 1 atmosphere of pressure, 1 atm = × 1.0 105 2 N m = × 1.0 105 Pa Coulomb constant, 1 N m⋅ 2 k = = 9.0×109 4πε 0 C2 Proton mass, m = × 1.67 10−27 p kg Neutron mass, m = × 1.67 10−27 n kg Electron mass, m = × 9.11 10−31 e kg Elementary charge, e = × 1.60 10−19 C Vacuum permittivity, ε = × 8.85 10−12 0 C2 2 ( ) N m⋅ Vacuum permeability, µ = × 4 1 π 0 −7 0 (T⋅m) A 1 el
