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What is the cause of Lanthanide contract...

What is the cause of Lanthanide contraction.

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General electronic configuration of lanthanides Is `4f^(1-14) 5d^(0-1) 6s^(2)`. The distinguishing electrons of these elements enter 4f-subshell one by one. The f-orbtals, being too much diffushed in shape have ery poor shielding effect. So the attraction of the nucleus for the electron is highly increased and hence the lanthanide contraction is observed.
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PATHFINDER-PERIODIC CLASSIFICATION OF ELEMENTS AND PERIODIC PROPERTIES-QUESTION BANK
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  2. What is Lanthanide contraction?

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  3. What is the cause of Lanthanide contraction.

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  4. The element 119 has not been descovered. What would be the IUPAC name ...

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  5. Write the names and deduce the atomic numbers of the following. The ...

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  6. Write the names and deduce the atomic numbers of the following. the ...

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  7. Write the names and deduce the atomic numbers of the following. The ...

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  8. The electronic configuration of some elements are as follow : which ...

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  9. The electronic configuration of some elements are as follow : Which ...

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  10. The electronic configuration of some elements are as follow : Which ...

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  11. Consider the elements N, P, O, S. Arrange them increasing order of F...

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  12. Consider the elements N, P, O, S. Arrange them increasing order of E...

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  13. Consider the elements N, P, O, S. Arrange them increasing order of N...

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  14. What will be the increasing order of basicily of CrO, VO, Feo and TiO?...

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  15. The atomic no. of an element = 10. What its position in the periodic t...

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  16. The aqueous solution of a chloride of one clement is neutral in nature...

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  17. Out of the following pairs, which would you expect to have Lower fir...

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  18. Out of the following pairs, which would you expect to have More ioni...

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  19. Out of the following pairs, which would you expect to have Higher at...

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  20. Out of the following pairs, which would you expect to have More nega...

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