Give any two differences between lanthanoids and actinoids.

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Solution

The difference between lanthanoids and actinoids are:
Lanthanoids Actinoids
Lanthanides are involved in filling 4f orbitals. Compared to 5f electrons, the binding energy of 4f electrons is comparatively less than it.
Actinides are involved in filling 5f orbitals. Compared to 4f electrons, the shielding effect of 5f-electrons is less effective.
Except for promethium lanthanides are non-radioactive.
Elements in the actinide series are radioactive.
Compounds formed by lanthanides are less basic.
Compounds formed by actinides are highly basic.
For example, Lanthanum(La), Cerium(Ce), etc.
For example, Uranium(U), Plutonium(Pu), etc.

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Lanthanoids	Actinoids
Lanthanides are involved in filling 4f orbitals. Compared to 5f electrons, the binding energy of 4f electrons is comparatively less than it.	Actinides are involved in filling 5f orbitals. Compared to 4f electrons, the shielding effect of 5f-electrons is less effective.
Except for promethium lanthanides are non-radioactive.	Elements in the actinide series are radioactive.
Compounds formed by lanthanides are less basic.	Compounds formed by actinides are highly basic.
For example, Lanthanum(La), Cerium(Ce), etc.	For example, Uranium(U), Plutonium(Pu), etc.