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The electronic configuration of element ...

The electronic configuration of element of atom number 78 is :

A

`[Xe] 3f^(14)4d^(10)5s^0`

B

`[Kr] 3f^(14)4d^(8)`

C

`[Xe] 3f^(14)4d^(10)5s^2`

D

`[Xe] 4f^(14)5d^(9)6s^1`

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