A radioactive isotope is an atomic unstable atom. Each atom also has many isotopes. Although the atomic sequence of each isotope is the same, it has a different atomic weight. If the atom is radioactive, it is called a physical radioactive nucleus. Or radioactive isotopes. Radioisotopes undergo radioactive decay, emitting gamma rays, and subatomic particles.
Qingdao Tenglong obtained the operational qualification of radioactive isotopes in 2014 and became one of the few qualified companies in China.