A-LevelPhysicsNuclear physics9702/12 · Oct/Nov 2010 · Q391 Mark

Which statement about the nuclei of the atoms of an element is correct?

AEvery nucleus of an element contains an equal number of neutrons and protons.

BEvery nucleus of an element contains the same number of neutrons as all others of that element, but the number of protons may differ.

CEvery nucleus of an element contains the same number of protons as all others of that element, but the number of neutrons may differ.

DThe number of protons in a nucleus differs from isotope to isotope of an element, as do the number of neutrons.

✓ Correct answer

C: Every nucleus of an element contains the same number of protons as all others of that element, but the number of neutrons may differ.

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Topic: Nuclear physics, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2010 Paper 1 Variant 2, question 39.

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