Question

Table J

Required
Which subatomic particle has the least mass?
proton
neutron
electron

Answer 1

Electron

Step-by-step explanation:

As per the table containing masses of the subatomic particles, mass of neutrons and proton is roughly 1837x more than that of an electron.

An electron has no internal structure, so its mass is not defined by the energy of a force field that binds it together (as is in the case for protons and neutrons).

Hence, electron has the least mass.