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A-LevelChemistryAtomic structure9701/12 · May/June 2011 · Q11 Mark

Helium, He, is the second element in the Periodic Table. Tritium is the isotope of hydrogen ³H. What is the same in an atom of He and an atom of ³H?

Athe number of electrons

Bthe number of neutrons

Cthe number of protons

Dthe relative atomic mass

✓ Correct answer

B: the number of neutrons

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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 2011 Paper 1 Variant 2, question 1.

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