Concept:A neutral atom has no overall charge because its positive and negative charges balance exactly.Explanation:Protons carry a positive charge and electrons carry an equal negative charge.Neutrons have no charge, so they do not affect the atom’s charge balance.When the number of protons equals the number of electrons, the positive and negative charges cancel each other.This makes the atom electrically neutral.Answer:B. Proton number and electron number are the same.