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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^7 5d^1 6s^2`

B

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

C

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

D

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

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The correct Answer is:
A
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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:

TARGET PUBLICATION-D AND F-BLOCK ELEMENT -COMPETITIVE THINKING
  1. Lanthanoids are

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  2. The atomic number of Gadolinium (Gd) is 64. The CORRECT electronic con...

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

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  4. Which of the following oxidation states is the most common among the l...

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  5. Which is the oxidation state generally found in lanthanides?

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  6. Which one of the following lanthanide ions does NOT exhibit paramagnet...

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  7. Which of the following lanthanoids ions is diamagnetic?

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  8. What is the general molecular formula of the products obtained on heat...

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  9. Reason of lanthanoid contraction is

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  10. In lanthanoids , atomic radius decreases as atomic no. increases becau...

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  11. The most basic hydroxide from the following is

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

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  13. Which of the following pairs has the same size ?

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  14. Identify a 'Chemical twin' among the foolowings.

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  15. Which of the following statement(s) is/are incorrect for pair of elem...

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  16. Which of the following is NOT an actinide?

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  17. The actinoids exhibit more number of oxidation states in general than ...

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  18. The reason for greater range of oxidation state in actinoids is attrib...

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  19. The only radioactive element among the lanthanoids is

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  20. Identify the INCORRECT statement among the following.

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