1. Atomic structure & Periodic table

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Last updated 11:25 AM on 8/27/26
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4 Terms

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Relative atomic mass

The average mass of an atom of an element, relative to 1/12 of a carbon-12 atom

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Relative isotopic mass

The average mass of an isotope of an element, relative to 1/12 of a carbon-12 atom

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Equation linking moles, mass, and Mr

Number of moles = mass/Mr

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Mass spectrometer

Used to measure the relative masses of isotopes and the abundance of isotopes in the sample of element