question_answer 37)

  Heavy stable nuclei have more neutrons than protons. This is because of the fact that (a) neutrons are heavier than protons (b) electrostatic force between protons are repulsive (c) neutrons decay into protons through beta  decay (d) nuclear forces between neutrons are  weaker than that between protons

Answer:

  (b)Heavy nuclei, which are stable contain more neutrons than protons in their nuclei. This is because electrostatic force between protons is repulsive, which may reduce stability. Choice (b) is correct.