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Electron rest mass


When the mass of an electron becomes equal to thrice its rest mass, its speed is


The rest energy of an electron is.


The percentage increase in the rest mass of an electron when it is moving at a speed


Calculate the energy in MeV equivalent to the rest mass of an electron . Given that the


Calculate the equivalent energy of electrons and proton at rest. Given that mass of

The electron rest mass is the mass of a stationary electron. It is one of the fundamental constants of physics and is also very important in chemistry because of its relation to the Avogadro constant. It has a value of about 9.109×10−31 kilograms or about 5.486×10−4 atomic mass units, equivalent to an energy of about 8.187×10−14 joules or about 0.5110 MeV.
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  • Terminology 

  • Determination 

  • Relationship to other physical constants