Key term for Edexcel GCSE Chemistry, used in Qualitative Analysis: Tests for Ions.
The reciprocal of wavelength, measured in cm⁻¹, used as the unit for the x-axis on an infrared spectrum.
Wavenumber appears in Edexcel GCSE Chemistry revision content for Qualitative Analysis, Hydrocarbons and Polymers, especially Qualitative Analysis: Tests for Ions and Mathematical Applications.
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