A-LevelChemistryChemical periodicity9701/12 · May/June 2010 · Q31 Mark

Use of the Data Booklet is relevant to this question. The elements radon (Rn), francium (Fr) and radium (Ra) have consecutive proton numbers in the Periodic Table. What is the order of their first ionisation energies?

AFr Ra Rn

BFr Rn Ra

CRa Fr Rn

DRn Ra Fr

✓ Correct answer

A: Fr Ra Rn

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Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2010 Paper 1 Variant 2, question 3.

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