The other two types of decay are seen in all of the elements.
Table of modes of radioactive decay: Radionuclides can undergo a number of different reactions, summarized here.
A substance or object that emits nuclear radiation is said to be radioactive.
Such isotopes are radioactive, and are referred to as “radioisotopes.” There are many types of emmitted particles and radiation that radioisotopes produce when they decay.
She and her husband, Pierre, soon discovered two new radioactive elements, which she named polonium, after her native land of Poland, and radium, because it radiates.
These two new elements filled holes in the periodic table and displayed much higher levels of radioactivity than uranium.
Alpha particles have greater mass than beta particles.
By passing alpha particles through a very thin glass window and trapping them in a discharge tube, researchers found that alpha particles are equivalent to helium (He) nuclei.