Wed February 01, 2012 By:

Which is the smallest sub- atomic particle of an atom found till now? And what is it's mass?

Expert Reply
Mon February 06, 2012

Neutrino is the smallest subatomic particle by mass. It has a mass less than 0.1 eV.

Electron has a mass close to 0.511 MeV and quarks have a mass ranging from 1.5 to 8.5 MeV.

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