All of the naturally occuring radioactive elements are concentrated between atomic numbers 84 and 118 on the periodic table, though Tc and Pm are an exception. Also note that there is a break between 110 and 118 on the table, which are suspected radioactive elements that have yet to be discovered. 29 radioactive elements have been identified by scientists to date:
- Technetium (TC)- Transition metal
- Promethium (Pm)- Rare earth metal
- Polonium (Po)- Metalliod
- Astatine (At)- Halogen
- Radon (Rn)- Noble gas
- Francium (Fr)- Alkali Metal
- Radium (Ra)- Alkali Earth Metal
- Actinium (Ac)- Rare Earth metal
- Thorium (Th)- Rare Earth Metal
- Protactinium (Pa)- Rare Earth Metal
- Uranium (U)- Rare Earth Metal
- Neptunium (Np)- Rare Earth Metal
- Plutonium (Pu)- Rare Earth Metal
- Americium (Am)- Rare Earth Metal
- Curium (Cm)- Rare Earth Metal
- Berkelium (Bk)- Rare Earth Metal
- Californium (Cf)- Rare Earth Metal
- Einsteinium (Es)- Rare Earth Metal
- Fermium (Fm)- Rare Earth Metal
- Mendelevium (Md)- Rare Earth Metal
- Nobelium (No)- Rare Earth Metal
- Lawrencium (Lr)- Rare Earth Metal
- Rutherfordium (Rt) or Kurchatovium (Ku)- Transition Metal
- Dubnium (Db) or Nilsborium (Ns)- Transition Metal
- Seaborgium (Sg)- Transition Metal
- Bohrium (Bh)- Transition Metal
- Hassium (Hs)- Transition Metal
- Meitnerium (Mt)- Transition Metal
No comments:
Post a Comment