atomic mass unit (amu) | 1.6605402 × 10^{−27} kg |

Avogadro’s number | 6.0221367 × 10^{23} mol^{−1} |

Boltzmann’s constant (*k*) | 1.380658 × 10^{−23} J K^{−1} |

charge-to-mass ratio for electron (*e/m*_{e}) | 1.75881962 × 10^{11} C kg^{−1} |

electron charge (*e*) | 1.60217733 × 10^{−19} C |

electron rest mass (*m*_{e}) | 9.1093897 × 10^{−31} kg |

Faraday’s constant (*F*) | 9.6485309 × 10^{4} C mol^{−1} |

gas constant (*R*) | 8.205784 × 10^{−2} L atm mol^{−1} K^{−1} = 8.314510 J mol^{−1} K^{−1} |

molar volume of an ideal gas, 1 atm, 0 °C | 22.41409 L mol^{–1} |

molar volume of an ideal gas, 1 bar, 0 °C | 22.71108 L mol^{–1} |

neutron rest mass (*m*_{n}) | 1.6749274 × 10^{−27} kg |

Planck’s constant (*h*) | 6.6260755 × 10^{−34} J s |

proton rest mass (*m*_{p}) | 1.6726231 × 10^{−27} kg |

Rydberg constant (R) | 1.0973731534 × 10^{7} m^{−1} = 2.1798736 × 10^{−18} J |

speed of light (in vacuum) (*c*) | 2.99792458 × 10^{8} m s^{−1} |