Question Detail

CHM 101 Quantum Theory and Atomic Structure Objective Question

Question

What does the mass number (atomic mass) of an atom represent?
Options
A The number of protons only
B The number of neutrons only
C The total number of protons and neutrons
Correct Answer
D The number of electrons only
Correct Answer

Option C is the correct answer.

Detailed Explanation

The mass number (also called atomic mass) represents the total number of protons and neutrons in the nucleus of an atom. It is calculated by adding the number of protons to the number of neutrons.

Hint

The mass number is the sum of the particles in the nucleus.

Question Info