Chemistry A-Level
Molecular versus ionic substances
What Molecular versus ionic substances means in Chemistry A-Level, as defined for OCR.
Definition of Molecular versus ionic substances
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Reference: OCR
Relative molecular mass is used only where discrete molecules exist, while relative formula mass is used for ionic or giant structures.
Topics that use Molecular versus ionic substances
- Atomic structure and isotopes (OCR A-Level)
Related terms
- atomic number
- Calculation accuracy
- isotopes
- Isotopic abundance
- Isotopic abundance and its effect on the mean
- mass number
- Relative atomic mass
- Relative atomic mass as a weighted mean
Using Molecular versus ionic substances in the exam
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