O-LevelChemistryAtomic Structure5070/11 · Oct/Nov 2011 · Q71 Mark

A researcher notices that atoms of an element are releasing energy. Why are the atoms releasing energy?

AThe atoms are absorbing light.

BThe atoms are evaporating.

CThe atoms are radioactive.

DThe atoms react with argon in the air.

✓ Correct answer

C: The atoms are radioactive.

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2011 Paper 1 Variant 1, question 7.

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