O-LevelChemistryAtomic Structure5070/11 · May/June 2020 · Q71 Mark

Which definition of isotopes is correct?

Aatoms of different elements which have the same number of electrons

Batoms of different elements which have the same number of neutrons

Catoms of the same element which have different numbers of electrons

Datoms of the same element which have different numbers of neutrons

✓ Correct answer

D: atoms of the same element which have different numbers of neutrons

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2020 Paper 1 Variant 1, question 7.

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