Question

The atomic number of an atom identifies the number of protons in its nucleus.

If the overall charge on the atom is neutral, what must the atomic number also identify?

A.
the most common isotope's mass

B.
the average mass of all isotopes of the atom

C.
the number of electrons in the atom

D.
the number of neutrons in the atom

Answer 1

C. the number of electrons in the atom

Neutrality with respect to charge means that the magnitude of negative and positive charge is equal.