Question

What is the atomic mass?

A: The sum of the protons and neutrons


B: The difference of the protons and neutrons


C: The sum of the protons and electrons


D: The difference of the protons and electrons.

Answer 1

I realize this was asked quite a while ago, but just in case anyone else has the same question, I will answer it.

The answer is A) The sum of the protons and neutrons.

To find the mass of an atom you must add the number of protons with the number of neutrons.