Question

3. Which best describes the definition for the atomic mass of an element?

A. It is a ratio based on the mass of the carbon-12 atom.

B. It is the sum of the protons. And neutrons in one atom of the element.

C. It is twice the number of protons in one atom of the element.

D. It is a weighted average of the masses of an element’s isotopes.

Answer 1

B

Step-by-step explanation:

Its the sum of the protons and neutrons.