Question

Using the mass number and Atomic number of an atom:
1) how do you work out the number of neutrons in an atom.
2) how do you work out the number of electrons in an atom.
3) how do you work out the number of protons in an atom

Answer 1

1) Number of neutrons = Mass number - Atomic number
2) Number of electrons = Atomic number
3) Number of protons = Atomic number