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Z(eff) for 4s electron in (30)Zn I s:...

`Z_(eff)` for 4s electron in `_(30)Zn` I s:

A

`1.65`

B

4

C

12.85

D

4.35

Text Solution

Verified by Experts

The correct Answer is:
d
`Zn to (1s)^(2)(2s 2p)^(8)(3s 3p)^(8)(3d)^(10)(4s 4p)^(2)`
`sigma=1xx0.35+18xx0.85+10xx1.00`
=25.65
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