Molecular ion (M⁺)

Key term for OCR GCSE Chemistry A, used in Identifying the products of chemical reactions.

Definition

The positive ion formed when an entire molecule loses an electron, representing the unfragmented molecule in mass spectrometry.

Exam Context

Molecular ion (M⁺) appears in OCR GCSE Chemistry A revision content for Predicting and identifying reactions and products, especially Identifying the products of chemical reactions and Spectroscopy Charts.

Predicting and identifying reactions and products Identifying the products of chemical reactions Spectroscopy Charts

Found in Revision Notes

Predicting and identifying reactions and products

Spectroscopy Charts

Identifying the products of chemical reactions • Spectroscopy Charts

Revise note

Related Key Terms

Gas chromatography Mobile phase m/z (mass-to-charge ratio)Peak integration

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Relative formula mass (Mᵣ)

Retention time

Stationary phase