SSC MTS EXAM

Detailed explanation-1: -As the unstable nucleus attempts to become stable, it emits radiation and changes into a different element as the number of protons changes. This process is called radioactive decay and it continues until the forces in the nucleus are balanced and stable.

Detailed explanation-2: -Radioactive atoms have unstable nuclei, and when the nuclei emit radiation, they become more stable. Radioactive decay is a nuclear-rather than chemical-reaction because it involves only the nuclei of atoms.

Detailed explanation-3: -Radioactive decay is the change from an unstable atom to a more stable atom by the emission of radiation.