Question

Which particle of the atom is the smallest and has the least mass?

Answer 1

Protons and neutrons have very nearly the same mass ... equal to the mass of more than 1800 electrons.

Neutrinos have virtually zero mass .

The "size" of any of these is meaningless. They're waves, not little ping-pong balls

If you MUST make a choice, pick C.

Answer 2

Hi,

The answer is Electrons.