Answer:
The element polonium-210 has a mass number 210 and atomic number 84 decays by alpha emission to give an
element with a mass number of 206 and an atomic number of 82.
The element formed is known as Lead as it is the element that has an atomic number of 82
206Pb82—> 210Po84 + 4He2
This is the alpha decay of the Polonium to give Lead( Pb).