Chemistry- Module 2, Chapter 2

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5 Terms

1
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Relative atomic mass (Ar)

The weighted mean mass of an atom of an element compared to 1/12 of the mass of an atom of carbon-12

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Weighted mean mass

The percentage abundance of each element and the relative isotopic mass of each isotope

3
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Relative isotopic mass

The mass of an isotope of an atom compared to 1/12 of the mass of an atom of carbon-12

4
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Relative molecular mass (Mr)

The mean mass of a molecule compared to 1/12 of the mass of an atom of carbon-12

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