AQA GCSE Chemistry · 8462
Specification 4.8.3.7 · Paper 2
- Revise: Flame Emission Spectroscopy
A spectrum from a known substance, used to identify substances in an unknown sample by comparison.
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GCSE Chemistry · key term
A spectrum from a known substance used for comparison with an unknown sample.
Used by AQA, Edexcel and OCR
Specification 4.8.3.7 · Paper 2
A spectrum from a known substance, used to identify substances in an unknown sample by comparison.
Paper 2
Spectral data from a known substance, used for comparison when identifying an unknown substance.
Revise: Mathematical Applications“There is a peak at 590 nm” describes the chart; “the sample contains the ion whose reference spectrum has a peak at 590 nm” interprets it. If the data are incomplete, overlapping or difficult to read, give a suitably cautious conclusion rather than claiming certainty.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A spectrum from a known element that can be compared with the spectrum of an unknown sample.
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