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GCSE Chemistry · key term
The proportion or percentage of the atoms in a sample that are a particular isotope.
Used by Edexcel and OCR
Specification 1.12, 1.15 · Paper 1, Paper 2
The proportion of a sample made up of a particular isotope, often expressed as a percentage.
Specification C4.2g · Paper 2 (Foundation), Paper 4 (Higher)
A measure of how much of an ion is detected compared with other ions in the same spectrum.
Revise: Interpreting Instrumental DataThe tallest peak is called the base peak and is assigned a relative abundance of 100. A molecule may also produce a molecular ion when the whole molecule becomes charged without breaking apart. Other peaks can come from smaller charged fragments.
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