O-LevelChemistryAtomic Structure5070/11 · Oct/Nov 2021 · Q81 Mark

Which statement about atoms and ions is correct?

AAtoms and ions of the same element must have different numbers of neutrons.

BIsotopes of different elements must have different numbers of neutrons.

CThe charge on a positive ion = (nucleon number – number of neutrons – number of electrons).

DThe number of protons and number of neutrons in an atom must be the same.

✓ Correct answer

C: The charge on a positive ion = (nucleon number – number of neutrons – number of electrons).

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2021 Paper 1 Variant 1, question 8.

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