Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

Uranium is used by a nuclear power station to produce thermal energy.

(a)[2]

Explain what is meant by the term isotope.

(b)[2]

Describe the relative ionising effect, and the relative penetrating ability, of a $\beta$-particle.

(c)[2]

Find the fraction of the uranium-239 still present after 46 minutes.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “unchanged number of protons / atomic number” …