One of the particles in an atom is called an electron. It has a charge of -1. Another particle in an atom is a proton. It has charge of +1. The charge of an atom is the sum of the charges of the electrons and the protons. A carbon atom has an overall charge of 0, because it has 6 electrons and 6 protons and "-" 6+6=0. Find the overall charge for the rest of the elements on the list. charge from electrons charge from protons overall charge carbon -6 +6 0 neon -10 +10 oxide -10 +8 copper -27 +29 tin -50 +50