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 (mass number=218, atomic number=84) decays with an emission of an alpha particle to form X, which emits a beta particle to form Y, which emits an alpha particle to form Z.  Identify X, Y, and Z.

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QUESTION 4

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 (mass number=218, atomic number=84) decays with an emission of an alpha particle to form X, which emits a beta particle to form Y, which emits an alpha particle to form Z.  Identify X, Y, and Z. 

You don't have to write the nuclear reactions.  I just want you to give the symbols of X, Y, and Z with their correct mass numbers and atomic numbers.

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