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The 71^(st) electron of an element X wit...

The `71^(st)` electron of an element X with an atomic number of 71 enters into the orbital

A

`4f`

B

`6p`

C

`6s`

D

`5d`

Text Solution

Verified by Experts

The correct Answer is:
D
For 71st electron :
`Z = 70 " " [Xe]^(54) 4f^(14) 6s^2`
`Z = 71 " " [Xe] 4f^14 5d^1 6s^2`.
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