Difference between revisions of "Actinides"
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(Created page with "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...") |
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| − | The actinides, also known as '''actinoids''', is | + | The '''actinides''', also known as '''actinoids''', is series of 15 metallic chemical elements from the 7th period of the f-block in the periodic table, right below the [[lanthanide|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. | 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. | ||
Revision as of 16:07, 1 October 2015
The actinides, also known as actinoids, is series of 15 metallic chemical elements 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
