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A-LevelChemistryAtomic structure9701/12 · May/June 2010 · Q21 Mark

Use of the Data Booklet is relevant to this question. What could be the proton number of an element that has three unpaired electrons in each of its atoms?

A5
B13
C15
D21

✓ Correct answer

C: 15

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About this question

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

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