Radioactive isotopes with high atomic numbers often decay to form isotopes that are themselves radioactive, and once formed,

Question

Radioactive isotopes with high atomic numbers often decay to form isotopes that are themselves
radioactive, and once formed, decay to form new isotopes. Sometimes a series of such decays occurs over many steps until a stable nucleus is formed. The following series of decays occurs: Polonium-218 decays with emission of an a particle to form X, which emits a ß particle to form Y, which emits an  particle to form Z. Identify X, Y, and Z.
Give all nuclei in the form AZX.

X:
Y:
Z:

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