Question

in an electrically neutral atom, the number of protons equals the number of neutrons. protons equals the number of electrons. neutrons equals the number of electrons.

Explanation:

In an electrically neutral atom, protons (positively - charged) and electrons (negatively - charged) balance each other out. So the number of protons equals the number of electrons. Neutrons have no charge and their number is not related to electrical neutrality in this context.

Answer:

protons equals the number of electrons.