Question

Which is heavier, neutron or proton?

Answer 1

Proton:

1. A positively charged sub-atomic particle present in the nucleus of an atom is known as proton.
2. The mass of proton is $1.672\times {10}^{-27}\mathrm{kg}$.

Neutron:

1. A electrically sub-atomic particle present in the nucleus of an atom is known as neutron.
2. The mass of neutron is $1.674\times {10}^{-27}\mathrm{kg}$.

Thus, the neutron is slightly heavier than proton.