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| 1. |
The actinide contraction differs from lanthanide contraction? Explain. |
| Answer» Solution :Lanthanide CONTRACTION refers to the gradual DECREASE in the size of the lanthanoids and their trivalent ions, `( Z = 58 ` to `71)` whereas actinoid contraction refers to the gradual decrease in the size of the actinoids or their ions `( M^(3+)` or `M^(4+)) ( Z = 90 ` to `103 )`. The differ in the FACT that int he actinoid series, the contraction is greater from element to element DUE to poor shielding by 5f electrons thanby 4f electrons. | |