Radioactive elements are unstable, and the shorter the half-life, the more unstable they are.
As a radioactive and unstable element roentgenium can be dangerous.
it is unstable and decays to another element
Uranium238
The element fluorine is extremely unstable as it will react with any other element making it very hard to contain.
A property of that element. An unstable element. A radioactive element
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.
Uranium is unstable, radioactive element.
It is a radioactive element.
Through radioactive decay, because Uranium (element 92) is unstable.