To what element does polonium-208 (atomic number 84 decay when it emits an alpha particle?

Explanation:-

Alpha Decay: In this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle or a helium nucleus.The atomic number gets reduced by 2 units and the mass number is reduced by 4 units.

General representation of an element is given as:

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

The chemical equation for a alpha decay is represented as:

i think it is true since you can test the answer and can use observations to complete it.

if you're asking what comes out, it's steam.