# Electron Constants

### - table or chart of electron constants including symbol, value and units for values such as electron specific charge, electron molar mass, electron specific charge, etc.

### In this section

Electron constants are used in many areas of science and electronics for a variety of calculations.

The electron constants that come under the universal constants heading include items such as the electron specific charge, electron molar mass, electron specific charge, etc.

Details for these electron constants and more are given below. The constant name, symbol, value, units and the relative uncertainty are provided.

Constant name | Symbol of constant | Value | Units | Relative Uncertainty |
---|---|---|---|---|

Electron mass | Me |
9.109 389 7 | 10^-37 kg |
0.59 |

Electron mass in electron volts | |
0.510 999 06 | MeV |
0.30 |

Electron-proton mass ratio | me/mp |
5.446 170 13 | 10^-4 |
0.02 |

Electron α particle mass ratio | me/m&almpga; |
1.370 933 54 | 10^-4 |
0.021 |

Electron specific charge | -e/me |
-1.758 819 62 | 10^11 C kg^-1 |
0.30 |

Electron molar mass | M(e) |
5.485 799 03 | 10^-7 kg/mol |
0.23 |

Crompton wavelength | λc |
2.426 310 58 | 10^-12 m |
0.089 |

Classical electron radius | re |
2.817 940 92 | 10^-15 m |
0.13 |

Thomson cross section | σe |
0.665 246 16 | 10^-28 m^2 |
0.27 |

Electron magnetic moment | µe |
928.477 01 | 10^-26 J T^-1 |
0.34 |

Electron-proton magnetic moment ratio | µe/µp |
658.210 6881 | |
0.010 |

## Read more popular reference pages & tables . . . . . |
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• dBm / Watts table | • Trig functions | • Fourier series | • Constants |

• SI base units | • SI prefixes | • Sidereal time | • Greek letters |

• Resistivity | • Physical constants | • Capacitance | • Circuit symbols |

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