Why is an atom electrically neutral?

Answer: An atom has no overall charge, it is electrically neutral. Protons, electrons, and neutrons are the three subatomic particles that make it up an atom. 

Electrons are negatively charged, neutrons are neutral, and protons are positively charged particles. Because atoms have an equal number of protons and electrons, they have no overall charge. Atoms with an equal amount of protons and electrons are electrically neutral because the charges on protons and electrons are of equal strength.