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By alpha decay polonium-214 is transformed in lead-210.
Po-214--------------alpha--------------Pb-210
The address of the Alpha Historical Museum is: Po Box 7, Alpha, MI 49902
1- 218 Po if emits one alpha and two beta particles it becomes 214 Po
2- 214 Po if emits one alpha and two beta particles it becomes 210 Po.
This is all hypothetical.
Alpha Particles
Po-216- -----------------> Pb-212