Question #b0f93

1 Answer
Sep 19, 2017

Radioactive elements emit radioactive emissions which contain #alpha# and #beta# emissions in which particles Helium Nuclei and Electrons respectively are emitted.

After such particle emissions, the nucleus which is in an excited state tends to transition to lower energy states and hence finally to the ground state. In doing so, there is emission of EM radiation in form of #gamma#-rays and are such emissions are called #gamma# emissions.

Radioactive elements such as, Uranium, Polonium and Radium are such elements which undergo spontaneous radioactive emissions.