1.

Gadolinium belongs to 4f series. Its atomic number is 64. Which of the following is the correct electronic configuration of gadolinium

Answer»

`[Xe]4F^(9)5s^(1)`
`[Xe]4f^(7)5d^(1)6s^(2)`
`[Xe]4f^(3)5d^(5)6s^(2)`
`[Xe]4f^8 6d^2`

ANSWER :B


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