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Mass spectrometry

Lesson 10 / 11

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I can explain how mass spectrometry is used to identify isotopes and molecular structures, and calculate relative atomic masses.

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Isotopes are atoms of the same element with different numbers of neutrons. Relative abundances of isotopes can be used to calculate the relative atomic mass (RAM) of an element. Mass spectrometry ionises samples to create positive ions for analysis. The M⁺ peak represents the molecular ion, indicating the molecular mass. Fragmentation in mass spectrometry helps identify molecular structure by breaking molecules into smaller ions.

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