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