Question

Which statement describes the relative masses of two different particles?

1.A neutron has less mass than a positron.
2.A beta particle has less mass than a neutron.
3.An alpha particle has less mass than a positron.
4.An alpha particle has less mass than a beta particle.

Answer 1

The answer is 2. Beta particle is high energy electrons which is the same mass as positron with little mass. Alpha particle consists of 2 neutrons and 2 protons. Neutrons and protons have almost same mass which is much larger than electrons.