Chemistry GCSE
Isotope
What Isotope means in Chemistry GCSE, as defined for OCR.
Definitions of Isotope
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Atoms of the same element with the same number of protons but a different number of neutrons (and therefore a different mass number).
Atoms of the same element with the same number of protons but a different number of neutrons.
Topics that use Isotope
- Topic C1: Particles (OCR GCSE)
- Topic C2: Elements, compounds and mixtures (OCR GCSE)
Related terms
Using Isotope in the exam
Definition questions usually carry one or two marks, and examiners look for the precise wording. Write the definition from memory, check it against the version above, and then use the term in a longer answer on the same topic so it sticks.
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