Examples of actinide in the following topics:
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- Lanthanides and actinides are elements of the inner transition series of the periodic table.
- Actinides are typical metals.
- Like the lanthanides, all actinides are highly reactive with halogens and chalcogens; however, the actinides react more easily.
- Actinides, especially those with a small number of 5f electrons, are prone to hybridization.
- Most actinides exhibit a larger variety of valence states.
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- By expanding the horizontal dimensions of the table, the actinide and lanthanide rows can be put into their correct relative positions.
- Taking the extension of the periodic table even further, consider an element with atomic number 92 in the actinide series, called uranium.
- In 1934 only 4 actinides were known, all smaller than uranium, so it was not known that they formed a period or family like the lanthanides.
- The actinides were added along with the lanthanides.
- The lanthanides and actinides are added as separate but connected rows, building what is called the f-block.
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- Due to their large size, lanthanides, actinides, and early transition metals tend to have high coordination numbers.
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- Carbides of the actinide elements, which have the structure MC2 and M2C3, are also described as salt-like derivatives of C22-.
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- The f block, usually offset below the rest of the periodic table, includes the lanthanides and actinides.