Mass of Electrons

[Isabel Day 1D]

Do electrons vary in mass or is it always the same?

[Anne Tsai 1F]

The mass of an electron is always 9.109 x 10^-31 kg.

[Dan M -3E]

It's always the same.

[Camellia Liu 1J]

I believe all electrons have the same mass. In J.J. Thomson's experiment involving cathode rays, he found that electrons were the same regardless of the metal that was used for the cathode. The mass of an electron I think is approximately 9.109x10^-31 kg or 5.489x10^-4 amu.

[alexfwang3g]

They're constant at around 9.11 x 10^-31 kg.

[Anokhi Patel 2B]

The mass of an electron is always constant at 9.10938356 × 10-31 kilograms and corresponds to a resting energy of 0.115 MeV.

[Sreyes_1C]

I believe it is always the same and it was a constant listed in the test sheet last week.