Finding the number of protons, neutrons, electrons, and atomic mass of an atom?
- Atomic Mass: Adding the protons and neutrons.
- Protons: Equal to the Atomic #, or the Atomic Mass minus the neutrons.
- Neutrons: Atomic mass minus the protons.
- Electrons: Equal to the protons if charge is 0. If not and the charge is +, then you would subtract the amount. If -, then add the amount of electrons from protons.