Practicing Success
There is similarity in the properties of second and third transition series. This is because of which of the following? |
Lanthanoid contraction Actinoid contraction Lanthanoid expansion Actinoid expansion |
Lanthanoid contraction |
The second and third transition series elements have almost similar atomic radii. In the third transition series after lanthanum there is lanthanoid contraction, due to ineffective shielding by intervening 4f -orbital electrons and hence second & third transition series elements have similar atomic radii. |