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← Topic 23 overviewTOPIC 23 ASSESSMENT

Nuclear physics

CIE-style questions assess mass–energy, binding energy, fission and fusion, activity, decay constant and half-life.

Objective question 1

Nuclear binding energy is obtained from mass defect using:

Objective question 2

Binding energy per nucleon is greatest near:

Objective question 3

Radioactive decay of an individual nucleus is:

Objective question 4

Activity is related to undecayed nuclei by:

Objective question 5

Half-life and decay constant obey:

Structured question 1

A reaction loses 0.0050 u of mass. Calculate released energy using 931.5 MeV per u.

Structured question 2

A sample contains 2.0 × 10¹² nuclei with λ = 3.0 × 10⁻⁶ s⁻¹. Calculate activity.

Structured question 3

Calculate half-life when λ = 0.035 s⁻¹.