1.

Gadolinium belongs to 4f series.Itas atomicnumber is 64.Which of the followingis the correctelectronic configuration of gadolinium?

Answer»

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

Solution :`GD( Z= 64)= [ Xe]^(54) 6s^(2) 4f^(7) 5d^(1)`


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