In physics, the electron mass or mass of electron or electron rest mass one of the fundamental constants and is defined as the mass of a stationary electron. Denoted by me. The value of electron mass is also known as the invariant mass of an electron.
Electron Mass Value
Electron mass is sometimes termed as rest mass because according to the special theory of relativity mass of the object is said to vary according to the frame of reference.
Electron mass me = 9.109 ×10−31 Kilograms
The electron mass value can be expressed through various units like, electron mass in amu, electron mass in eV. Refer the table given below for units along with electron mass value-
| Mass of electron | Values | |
| mass of electron in kg | 9.10938356(11) × 10−31 | kg |
| mass of electron in grams | 9.10938356(11) × 10−28 | grams |
| mass of electron in amu | 5.48579909070(16)×10−4 | amu |
| mass of electron in ev | 0.5109989461(31) | MeV/c2 |
Rest Mass Of Electron
The rest mass of electron or mass of electron can be calculated from fine structure constant(α) got through spectroscopic measurements and Rydberg constant (R∞).
Rest Mass Of Electron formula
By using the definition of Rydberg constant we can write –
m e = 2 R ∞ h /c α 2
Where,
- me is the rest mass of electron.
- h is the Planck Constant.
- c is the velocity of light in vacuum.
- R∞ is the Rydberg constant.
- α is the fine structure constant.
Hope you have understood about Mass of electron. Including, definition, formula, terms along with units, Rest mass of electron values, in various units like- mass of electron in kg, mass of electron in grams, mass of electron in amu, mass of electron in eV