Heavy stable nuclei have more neutrons than protons. This is because of the fact that

Options

A. neutrons are heavier than prtons.
B. electrostatic force between protons are repulsive.
C. neutrons decay into protons through beta decay.
D. nuclear force between neutrons are weaker than that between protons.

Answer

B

Explanation

In large nuclei, to balance large number of couloube repulsion, more neutrons are needed since nuclear forces are short ranged.