Here's why:
* Radioactive decay involves the spontaneous transformation of an unstable atomic nucleus. This transformation releases energy and often results in the emission of particles like alpha, beta, or gamma radiation.
* Alpha decay involves the emission of an alpha particle, which is essentially a helium nucleus (2 protons and 2 neutrons). This decay reduces the atomic number by 2 and the mass number by 4, resulting in a different element.
* Beta decay involves the emission of either an electron (beta minus decay) or a positron (beta plus decay). Beta minus decay increases the atomic number by 1, while beta plus decay decreases it by 1. Both processes result in the formation of a different element.
In contrast, other types of nuclear reactions, such as nuclear fission or fusion, also involve the formation of new elements but they are not spontaneous processes like radioactive decay.
