Atomic masses 0.0 / 5 ? ChemistryAtoms & bondsASOCR Created by: Amy McCreated on: 20-02-15 16:41 What isotope has been chosen as the international standard for the measurement of relative mass? C-12 1 of 5 What is relative atomic mass, Ar? the weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of C-12 2 of 5 What is relative isotopic mass? the mass of an atom of an isotope compared with 1/12 of the mass of an atom of C-12 3 of 5 What is relative formula mass, Mr? the weighted mean mass of a formula unit compared with 1/12 of the mass of an atom of C-12 4 of 5 What is relative molecular mass? the weighted mean mass of a molecule compared with 1/12 of the mass of an atom of C-12 5 of 5
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