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Gadolinium belongsd to 4f series. It's a...

Gadolinium belongsd to 4f series. It's atomic number is 64. which of the following is the correct electronic configuration of gadolinium ?

A

`[Xe] 4f^(9) 5s^(1)`

B

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

C

`[Xe] 4f^(6) 5d^(2) 6s^(2)`

D

`[Xe] 4f^(8) 6d^(2)`

Text Solution

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The correct Answer is:
B
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Read the passage given below and answer the following questions: Although actinoids are similar to lanthanoids in that their electrons fill the 5f orbitals in order, their chemical properties are not uniform and each element has characteristic properties. Promotion of 5 - 6d electrons does not require a large amount of energy and examples of compounds with 77 acid ligands are known in which all the 5f, 60, 7s, and 7p orbitals participate in bonding. Trivalent compounds are the most common, but other oxidation states are not uncommon. Especially, thorium, protactinium, uranium, and neptunium tend to assume the +4 or higher oxidation state. Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of Gadolinium?

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The electronic configuration of gadolinium (At. No 64) is:

PRADEEP-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -Competition Focus (Jee Main and Advanced / Medical Entrance ) ( Multiple Choice Question I )
  1. The element with atomic number 56 belongs to which block ?

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  2. Europium is

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  3. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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  4. The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64)...

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

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  6. Gd (64) has ………..unpaired electrons with sum of spin ………..

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  7. The electronic configuration of Gd^(2+)is :

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  8. The atomic number of cerium (Ce) is 58. The correct electronic con...

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  9. The element with atomic number 113 has recently been discovered...

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  10. An element with atomic number 106 has been discovered recently. Which ...

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  11. The element Z=114 has been discovered recently. It will belong to whic...

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  12. The element with atomic number 117 if discovered would be placed in

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  13. Which of the following pairs contain metalloid elements in the p...

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  14. Among the elements from atomic number 1 to 36 the number of eleme...

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  15. The number of d-electrons in Fe^(2+)(Z=26) is not equal to the number...

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  16. The atom of smallest atomic radius among the following is

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  17. Among the elements Ca,Mg,P and Cl the order of decreasing atomic radii...

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  18. Identify the wrong statement in the following ?

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  19. The ionic radii of N^(3-), O^(2-) and F^(-) are respectively given by:

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  20. The species Ar,K^(+) and Ca^(2+) contain the same number of electrons....

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