Question

If you are given the mass number and atomic number of an atom explain how you would find the number of protons neutrons and electrons

Answer 1

Atomic number is same number as the protons...

Neutrons = Mass number - Atomic number ( protons)

Electrons are same number as protons unless the element has a charge..
If it has a charge of +2 it means that the element has 2 less electrons than the neutral atom. If it has a charge of -2 it means that the element has 2 more electrons than what it is supposed to..