Nuclear decay is the type of decay that causes the mass number of a nucleus to change.
In the field of science, a mass number can be described as the number of neutrons as well as the number of protons in an atom.
Nuclear decay can be described as a process by which an unstable atom splits into two atoms in order to get stable. For such a process, the proton and neutron numbers in the nucleus will change. This is because the unstable element is splitting into a new stable element. Hence, we can say that nuclear decay is a process in which the mass number of an atom is subjected to change.
To learn more about decay, click here:
https://brainly.com/question/24115447
#SPJ4
