O-LevelChemistryBonding & Structure5070/11 · May/June 2011 · Q91 Mark

Element X has the electronic structure 2,8,5. Element Y has the electronic structure 2,8,7. What is the likely formula of a compound containing only X and Y?

AXY3

BX2Y3

CX3Y

DX3Y2

✓ Correct answer

A: XY3

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2011 Paper 1 Variant 1, question 9.

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