Give three difference between lanthanoids and actinides
Answers
Similarities between lanthanides and actinides
Both the series show a +3 oxidation state.
In both the series the f-orbitals are filled gradually.
Ionic radius of the elements in both the series decreases with the increase in atomic number.
The electro negativity of all the elements in both the series is low and are said to be highly reactive.
The nitrates, per chlorates and sulphates of all the elements are soluble while the hydroxides, fluorides and carbonates are insoluble.
Differences between lanthanides and actinides
Lanthanides have the ability to show a maximum oxidation state of +4 while actinides show oxidation states of +3, +4, +5, +6 and +7.
Lanthanides do not form complexes easily. Actinides have a greater tendency to form complexes with ligands such as thio-ethers.
All lanthanides are non-radioactive except promethium but actinides are radioactive in nature.
Lanthanides do not form oxocations, but actinides form oxocations such as UO+, PuO+, NpO2+.
Most of the lanthanides are colorless in nature but most of the actinides are colored ions.
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