Question

How does the atomic mass of an atom differ from the atomic number?

1.The atomic mass involves neutrons, while the atomic number does not.
2.The atomic mass involves electrons, while the atomic number does not.
3.The atomic mass involves protons, while the atomic number does not.

Answer 1

1.

Step-by-step explanation:

Atomic mass is protons+neutrons. Atomic number is just protons.