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The outer electronic configuration of Gd...

The outer electronic configuration of Gd (At.No. 64) is

A

`4f^(3)5d^(5)6s^(2)`

B

`4f^(8)5d^(0)6s^(2)`

C

`4f^(4)5d^(4)6s^(2)`

D

`4f^(7)5d^(1)6s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Gd (64) has electronic configuration as `[Xe]_(54)4f^(7)5d^(1)6s^(2) "instead of" [Xe]_(54)4f^(8)6s^(2)`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Practice exercise (Exercise 1)
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  4. Identify the incorrect statement among the following.

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  5. The atomic size of cerium and promethium is quite close, because

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  6. The lanthanide contraction relates to

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  7. Because of lanthnoid contraction, which of the following pairs of elem...

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  8. Ln^(3+) (trivalent lanthanides ions ) have electronic configuration.

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  9. The basicity of lanthanoid hydroxides, across the lanthanoid series

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  10. There are 14 elements in actinoid series. Which of the following eleme...

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  11. lanthanoid contraction, the unique in the chemistry of lanthanoids, is...

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  12. Misch metal is

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  13. Consider the following statements, (I) La(OH)(3) is the least basi...

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  14. Which one of the following exists in the oxidation state other than +3...

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  15. The radius of La^(+) (at no 57) is 1.06Å. What may be the radius of Lu...

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  16. Lanthanoid contraction is caused due to:

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  17. Match the Column and choose the correct option from codes given below.

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  18. Which of the following ion acts as an oxidising agent?

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  19. Which of the following has got incompletely filled f-subshell?

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  20. The first ionsation enthalpies of the lanthanoids are around…A….,the s...

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