1. The problem statement, all variables and given/known data state the number of protons electrons and neutrons of these: Magnesium-25 Cu-65 2. Relevant equations protons is the same as atomic numbber, same with electrons. NEUTrons is atomic number - atomic mass 3. The attempt at a solution Magnesium-25 Cu-65 p- 12 p-29 e-12 e-29 n 25-12=13 n-65-29=36 am i right?