2.1.1 - atomic structure and isoptopes
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5 Terms
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Relative Isotopic mass definition
The mass of an atom of an isotope compared with 1/12th the mass of an atom of carbon-12
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Formula for relative atomic mass (RAM)
(isotopic mass x percentage abundance) / 100
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Relative atomic mass (Ar) definition
Weighted mean mass of an atom of an element compared with 1/12th of an atom of carbon-12
Is th average mass of all isotopes
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Formula for working out the Relative atomic mass from a mass spectrometry graph
(%abundance × m/z)+ ( %abundance × m/z)/100
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Definition of isotope
Atoms of the same element with a different no of neutrons so different masses,
but the same no of protons
Note 
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