Question

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

Explanation:

A neutral atom has no net electrical charge. Protons have a positive charge and electrons have a negative charge. 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, a low level of reactivity can be due to various factors like a full outer shell, and the ability to change to another substance during a chemical reaction is a property of reactivity.

Answer:

the number of electrons equal to the number of protons