O-LevelChemistryAtomic Structure5070/12 · May/June 2014 · Q61 Mark

An ion X⁺ has 23 nucleons and 10 electrons. What does the nucleus of X contain?

A9 protons, 14 neutrons

B10 protons, 13 neutrons

C11 protons, 12 neutrons

D13 protons, 10 neutrons

✓ Correct answer

C: 11 protons, 12 neutrons

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2014 Paper 1 Variant 2, question 6.

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