A-LevelPhysicsNuclear physics9702/12 · Oct/Nov 2015 · Q401 Mark
A radioactive nucleus emits an α-particle or a β-particle, creating a product nucleus. Which decay process could create the product nucleus stated?
Aradioactive nucleus: ²²⁶₈₈Ra, decay: α, product nucleus: ²²⁴₈₆Rn
Bradioactive nucleus: ²³⁸₉₂U, decay: α, product nucleus: ²⁴²₉₄Pu
Cradioactive nucleus: ²²⁸₈₈Ra, decay: β, product nucleus: ²²⁸₈₇Fr
Dradioactive nucleus: ²³¹₉₀Th, decay: β, product nucleus: ²³¹₉₁Pa
✓ Correct answer
D: radioactive nucleus: ²³¹₉₀Th, decay: β, product nucleus: ²³¹₉₁Pa
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