Which of the following objects is electrically neutral? A) An object with more electrons than protons B) An object with more protons than electrons C) An object with equal numbers of protons and electrons D) An object containing only neutrons

What “electrically neutral” means here

An object is electrically neutral when its total (net) electric charge is zero. Net charge comes mainly from protons (positive) and electrons (negative), since neutrons have no charge.

Checking each option using net charge

• A) More electrons than protons: extra electrons give a negative net charge.
• B) More protons than electrons: extra protons give a positive net charge.
• C) Equal numbers of protons and electrons: charges cancel because $+1$ (proton) and $-1$ (electron) add to $0$.
• D) Only neutrons: neutrons are neutral, but a real “object” made only of neutrons is not an ordinary stable object (it would be more like neutron-star matter). In typical atomic matter, neutrality is defined by balancing protons and electrons.

The key idea in one line

Neutrality happens when $$N_p = N_e \quad \Rightarrow \quad (+1)N_p + (-1)N_e = 0.$$