Chemistry Key Definitions 0.0 / 5 ? ChemistryAll TopicsASOCR Created by: AniaMarisSUCreated on: 23-03-15 16:12 Relative atomic mass (Ar) Is the weighted mean mass of an atom of an element compared with one twelth of the mass of the atom carbon-12 1 of 3 Relative Isotopic Mass Is the mass of an atom of an isotope compared with one twelth of the mass of an atom carbon-12 2 of 3 Relative Molecular Mass The relative molecular mass is the weighted mean mass of a molecule compared with on twelth of the mass of an atom of carbon-12. 3 of 3
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