Radioactive elements are unstable, and the shorter the half-life, the more unstable they are.
Polonium is the element in group 16 that has unstable isotopes. It is a radioactive element with no stable isotopes.
it is unstable and decays to another element
Uranium238
Radioactivity is the property in which unstable nuclei of an element spontaneously emit radiation.
No, americium is an unstable and radioactive chemical element.
chemical element, artificial, radioactive, unstable
All the isotopes of uranium (natural or artificial) are radioactive and unstable.
It means the element is unstable and gives off dangerous particles.
It is a radioactive element.
Uranium is unstable, radioactive element.
Helium is a stable element.
Through radioactive decay, because Uranium (element 92) is unstable.