chem 0.0 / 5 ? ChemistryThe Periodic TableASEdexcel Created by: falcon1711Created on: 06-12-18 19:37 Isotopes Atoms of the same element with different numbers of neutrons and different masses but the same number of protons 1 of 5 What is the relative isotopic mass? The mass of an isotope relative to 1/12th of the mass of an atom of carbon-12 2 of 5 What is the relative atomic mass? The weighted mean mass of an atom relative to 1/12th of the mass of an atom of carbon-12 3 of 5 What is the relative molecular mass? The average mass of a molecule or formula unit, compared to 1/12th of the mass of an atom of carbon-12 4 of 5 What is an atomic orbital? A region around the nucleus that can hold up to two electrons, with opposite spins 5 of 5
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