Chemistry The keyword for the chemistry exam. 2.0 / 5 based on 1 rating ? ChemistryASOCR Created by: NessieCreated on: 06-03-13 09:27 Isotopes Isotopes are atoms of the same element with different numbers of neutrons. 1 of 5 Atomic proton number Atomic proton number is the number of protons in the nucleus of an atom. 2 of 5 Mass nucleon number Mass nucleon number is the number of particles (protons and neutrons) in the nucleus. 3 of 5 An Ion An Ion isw a positively or negatively charged atom or covalently bonded group of atoms (a molecular ion) 4 of 5 Relative isotopic mass Relative isotopic mass is the mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon 12. 5 of 5
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