Physics 0625 · IGCSE · Radioactivity

Radioactivity — practice question

A nucleus of the radioactive nuclide $^{218}_{84}\text{Po}$ first undergoes $\alpha$-decay and then $\beta$-decay. After both decays have occurred, what are the nucleon (mass) number and proton (atomic) number of the nuclide produced?

  • Anucleon number 214, proton number 85
  • Bnucleon number 216, proton number 85
  • Cnucleon number 214, proton number 83
  • Dnucleon number 216, proton number 83

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