Question

1. the atomic number of an element equals the number of: protons + neutrons electrons in the nucleus protons neutrons clear all

Explanation:

The atomic number of an element is defined as the number of protons in the nucleus of an atom of that element. Protons + neutrons gives the mass - number. Electrons are outside the nucleus. Neutrons are different from protons and do not determine the atomic number.

Answer:

C. Protons