O-LevelChemistryAtomic Structure5070/12 · Oct/Nov 2015 · Q61 Mark

The following data may refer to the atom or to the ion of the same element. • electronic configuration 2,8,8 • nucleon number 40 • proton number 20 Which element is described by these data?

Aargon

Bcalcium

Cchlorine

Dneon

✓ Correct answer

B: calcium

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2015 Paper 1 Variant 2, question 6.

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