Which subatomic particle has the smallest mass?
A)a proton
B)a neutron
C)an electron
D)an alpha particle

Question

Quizplus · Accepted Answer

Electrons are the smallest subatomic particles and have a mass of approximately 9.11 x 10^-31 kg. Protons and neutrons, on the other hand, have much larger masses, with a proton and neutron having a mass of approximately 1.67 x 10^-27 kg. Alpha particles are composed of two protons and two neutrons and therefore have a mass that is much larger than that of an electron.

Which Subatomic Particle Has the Smallest Mass