Radon
All transuranic elements are synthetic and radioactive.
A property of that element. An unstable element. A radioactive element
Livermorium is a radioactive element.
through radioactive decay
It is supposed that ununseptium is a halogen (non metal).
If an element is radioactive, it refers to the stability of their atomic nucleus. If that atomic nucleus is not stable, it is considered radioactive.
Uranium is considered a radioactive chemical element because uranium (all the isotopes) is unstable and emit nuclear radiations.
As radioactive element is an element that is on the Priodic Table of Elements. A Radioactive Element is usually radioactive.
non radioactive element
A radioactive element is one that discharges radiation. Uranium is a radioactive element. A radioactive element is very dangerous if you don't have protective clothing. You should never go near a radioactive element.
No, it is not radioactive.
No. the element francium will have the lowest electronegativity. However it is radioactive and for practical purpose, cesium is considered to be the element with lowest electronegativity.
Platinum is a metallic, solid, radioactive chemical element; now it is considered a natural element. Plutonium is a member of the actinides group.
radioactive decay
You think probable to artificial radioactive elements considered transition metals.
The radioactive element is composed of unstable nuclei that try to reach stability through emitting nuclear radiations as alpha, beta, and gamma nuclear radiations.
It's a semantic thing - by definition, if something gives out radiation, then it is radioactive. If an element gives off radiation, then it is a 'radioactive' element. If it does not give out radiation, then it is not 'radioactive'.