distinguish between lanthanide and actinide.
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Lanthanides
Actinides
Lanthanides are involved in the filling of 4f- orbitals. The binding energy of 4f electrons is comparatively less than that of 5f-electrons. Actinides are involved in the filling of 5f-orbitals. The shielding effect of 5f-electrons is less effective as compared to that of 4f-electrons.
Lanthanides are non-radioactive in nature except promethium Actinide series elements are radioactive.
The compounds formed by lanthanides are less basic. compounds of actinides are highly basic.
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