Question

The atomic number of an element represents the number of ____________ in the nucleus.

A.
Protons

B.
Neutrons

C.
Electrons

D.
Protons and Neutrons

Answer 1

The answer is protons

Answer 2

The number of protons. B isn't a value in itself (other than radioactive stability but that isn't relevant here), C is the charge (modulo 7), and D is the atomic mass.