O-LevelChemistryAtomic Structure5070/12 · May/June 2018 · Q261 Mark

Indium (proton number 49) is in Group III of the Periodic Table. Antimony (proton number 51) is in Group V of the Periodic Table. Which statement comparing indium and antimony is correct?

AAntimony has more metallic character and more valency electrons per atom than indium.

BAntimony has more metallic character; indium has more valency electrons per atom.

CIndium has more metallic character; antimony has more valency electrons per atom.

DIndium has more metallic character and more valency electrons per atom than antimony.

✓ Correct answer

C: Indium has more metallic character; antimony has more valency electrons per atom.

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2018 Paper 1 Variant 2, question 26.

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