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O-LevelPhysicsNuclear Physics5054/12 · May/June 2017 · Q401 Mark

What happens to the proton number (atomic number) of a nucleus as it emits an alpha-particle?

AIt decreases by one.
BIt decreases by two.
CIt decreases by four.
DIt does not change.

✓ Correct answer

B: It decreases by two.

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About this question

Topic
Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, May/June 2017 Paper 1 Variant 2, question 40.

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