What happens to a radioisotope when it undergoes nuclear decay?

The radioisotope changes into another element/atom through the process of nuclear decay

Explanation:

Nuclear decay is a process in which an unstable radioisotope changes into another element through the emission of characteristic radiation which are essentially fast moving energetic particles. This could be in the form of alpha, beta or gamma particles.

For example a Uranium, U-238 radioisotope gets converted to Thorium Th-234 nucleus through the release of alpha particles as shown below:

²³⁸U → ²³⁴Th + ⁴He

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.