Radiation can be harmful and in extremely high doses deadly to living organisms. Radioactive elements are those whose atoms have an unstable nucleus which causes them to emit energy in form of ionizing particles. This is a list of such elements.
| List of Radioactive Elements |
|---|
| Technetium |
| Promethium |
| Polonium |
| Astatine |
| Radon |
| Fracium |
| Radium |
| Actinium |
| Thorium |
| Neptunium |
| Uranium |
| Protactinium |
| Plutonium |
| Americium |
| Curium |
| Einsteinium |
| Californium |
| Berkelium |
| Fermium |
| Mendelevium |
| Nobelium |
| Dubnium |
| Rutherfordium |
| Lawrencium |
| Seaborgium |
| Bohrium |
| Hassium |
| Roentgenium |
| Darmstadium |
| Meitnerium |
| Ununbium |
| Ununtrium |
| Ununpentium |
| Ununhexium |
| Ununquadium |
| Ununseptium |
| Ununoctium |
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