Gadolinium belongs to 4f series. Its ato...

Gadolinium belongs to 4f series. Its 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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