Question

Stable Ions Quick Check
Question
Which of the following defines the atomic number of an atom?(1 point)
Responses

A. the number of neutrons

B. the number of valence electrons

C. the number of electrons, protons, and neutrons

D. the number of protons

Answer 1

The correct answer is:

D. the number of protons

The atomic number of an atom is defined as the number of protons it contains.