Physics 9702 · AS & A Level · Atoms, nuclei and radiation

Atoms, nuclei and radiation — practice question

The nucleus of the nuclide $^{241}_{94}\text{Pu}$ undergoes decay by first emitting a $\beta$-particle and then emitting an $\alpha$-particle. Which nucleus is produced?

  • A$^{239}_{93}\text{Np}$
  • B$^{239}_{91}\text{Pa}$
  • C$^{237}_{93}\text{Np}$
  • D$^{237}_{92}\text{U}$

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