What is the difference between lanthanides and actinides?
Answers
Answer:
Hint : Lanthanoids and actinoids are elements that are placed in the lanthanide and actinide series of the periodic table. Both the series are included under f− block elements of periodic table.
Complete answer:
> These elements are in f− block because their valence electron enters in f orbitals.
> Lanthanoids and actinoids form a group that is almost disconnected from the periodic table as they are placed on the bottom of the table. These are some main differences between lanthanoids and actinoids given below.
Lanthanide Actinoids
In lanthanide the filling of 4f
orbitals take place. In action the filling of 5f
orbitals take place.
This series includes elements from atomic number 57 to 71. This series includes elements from atomic number 89 to 103.
These elements are non-radioactive except promethium. All the elements of this series are radioactive.
Binding energy of 4f
orbitals is higher. Binding energy of 5f
orbitals is higher.
Lanthanoids have a low tendency to form complexes. Actinoids show greater tendency to form complexes.
Besides +3 oxidation number it also shows +2 and +4 oxidation state in few compounds. Besides +3 oxidation number it also shows +4,+5 and +7 oxidation state in few compounds.
Lanthanoids have a bright and silvery appearance. Most of the actinides ions are deeply coloured.
Lanthanoids and actinoids are elements that are placed in the lanthanide and actinide series of the periodic table. Both the series are included under f− block elements of periodic table.
...
Differentiate between lanthanoids and actinoids.
Lanthanide Actinoids
Lanthanoids have a Most of the actinides ions are
bright and silvery deeply coloured.
appearance.
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