O-LevelChemistryAtomic Structure5070/11 · May/June 2011 · Q81 Mark

Which statement about both chlorine atoms and chloride ions is correct?

AThey are chemically identical.

BThey are isotopes of chlorine.

CThey have the same number of protons.

DThey have the same physical properties.

✓ Correct answer

C: They have the same number of protons.

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2011 Paper 1 Variant 1, question 8.

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