Question

What information does the atomic mass of an element provide? A. the sum of electrons and protons in an atom B. the difference between the number of protons and electrons C. the number of protons and neutrons in an atom D. the number of isotopes

Answer 1

C...

the atomic mass denotes the sum of the subatomic particles in a nucleus of an atom (neutron & proton).... the reason why the electron is not included is because it is very light and thus thought to be negligible.