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In which 5f subshell is half-filled?...

In which `5f` subshell is half-filled?

A

`Am` and `Cm`

B

`Cm` and `Bk`

C

`Cm` and `No`

D

`No` and `Am`

Text Solution

Verified by Experts

The correct Answer is:
A
Americium `(Z = 95)` and curium `(Cm, Z = 96)` have `[Rn] 5f^(7) 6d^(0) 7 s^(2)` and `[Rn] 5 f^(7) 6d&(1) s^(2)` configuration, respectively.
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A2Z-THE D AND F BLOCK ELEMENTS-Lanthanides And Actinides
  1. Across the lanthanide series, the basicity of the lanthanoid hydroxide...

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  2. Lanthanides and actinides resemble in

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  3. Lanthanides contraction cause.

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  4. The speration of lanthanides by ion exchanges method is based on

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  5. The radiocative lanthanide is

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  6. Complete the following reaction

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  7. The pair of lanthanides with the highest third ionization energy is

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  8. All actinods have high desities except

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  9. Which one of the following is an electronic configuration of thorium?

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  10. Consider the following statement, (I) The size of the lanthanide M^(...

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  11. The actinoids exhibit, more member of oxidation states in general than...

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  12. Which of the following factor may be regarded as the main cause of lan...

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  13. In which 5f subshell is half-filled?

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  14. The actinides showing +7 oxidation state are:

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  15. Which of the following is not an actinide?

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  16. Which of the following statements is not correct?

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  17. Which of the following elements shows maximum number of different oxid...

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  18. Gadolinium (Gd) has 4f^(7) 5 d^(1) 6s^(2) electronic configuration out...

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  19. Which of the following elements is not an actinide?

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  20. Which of the following graphs shown correct trends in the size of + 3 ...

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