Actinides
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The actinides, also known as actinoids, is a 15 metallic chemical elements series from the 7th period of the f-block in the periodic table, right below the lanthanides. It comprises the elements from actinium to lawrencium, with atomic numbers from 89 to 103.
All the elements display similar chemical properties, but also display various oxidation states. They react with air and in finely divided form they are pyrophoric. Actinides are highly reactive towards halogens and chalcogens. All actinides are radioactive.
Of all the actinides, the most important are thorium and uranium. Plutonium and americium are also often encountered in several applications.
Members
- Actinium
- Thorium
- Protactinium
- Uranium
- Neptunium
- Plutonium
- Curium
- Americium
- Berkelium
- Californium
- Einsteinium
- Fermium
- Mendelevium
- Nobelium
- Lawrencium
