Which of the Following Correctly Describes the Atomic Number

Question

Which of the following correctly describes the atomic number?
A) The combined number of protons and neutrons
B) The number of protons
C) The number of electrons
D) The combined number of protons and electrons

Accepted Answer

The number of protons for each element is fixed and is indicated by the atomic number. The atomic mass is the combined number of protons and neutrons.