A-LevelChemistryChemical periodicity9701/12 · Oct/Nov 2016 · Q331 Mark

X is an element that has • its outer electrons in the 4th principal quantum shell, • a higher 1st ionisation energy than calcium. What could be the identity of X? 1 bromine 2 krypton 3 xenon

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

B: 1 and 2 only are correct

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Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2016 Paper 1 Variant 2, question 33.

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