Question

which feature defines a neutral atom? (1 point) a full outer electron shell the number of electrons equal to the number of protons the ability to change to another substance during a chemical reaction a low level of reactivity

Explanation:

A neutral atom has no net electric charge. Protons are positively - charged and electrons are negatively - charged. When the number of electrons equals the number of protons, the positive and negative charges cancel out, resulting in a neutral atom. A full outer electron shell relates to stability, not neutrality. The ability to change in a chemical reaction and low reactivity are not defining features of a neutral atom.

Answer:

the number of electrons equal to the number of protons