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Atomic Structure and the Periodic Table

proton a positively charged particle
neutron an uncharged particle
nucleus the combination of protons and neutrons at the center of an atom. has a positive charge because of protons
electrons negatively charged particles that move around outside the nucleus
atomic number the number of protons in the nucleus of an atom
atomic mass number the total number of protons and neutrons in an atom's nucleus
isotope an atom of one element that has a different number of neutrons than another atom of the same element
ion an atom or group of atoms that has a positive or negative electric charge
Created by: swimstar