O-LevelChemistryAtomic Structure5070/12 · Oct/Nov 2019 · Q221 Mark

The elements in Group I have similar chemical properties. Which statement explains why this is true?

AThey all have metallic bonding.

BThey all have the same number of complete electron shells.

CThey all have the same number of electrons in their outer shell.

DThey are all stored under oil to prevent reactions with the air.

✓ Correct answer

C: They all have the same number of electrons in their outer shell.

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 22.

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