# An atom of polonium-218 undergoes alpha decay. What new element is produced?

Apr 24, 2016

Alpha decay is the loss of two protons and two neutrons from a nucleus. This decreases the total mass number by $4$ and the atomic number by $2$.
$\text{_ 84^218"Po"-> ""_ 82^214"X"+""_ 2^2"He}$
Looking at the periodic table we can find that element number $82$ is lead, $\text{Pb}$, so the product element $\text{X}$ is $\text{Pb}$.