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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

11.25

B

18.75

C

25.65

D

4.35

Text Solution

Verified by Experts

The correct Answer is:
b
`(1s^(2))(2s^(2)2p^(6))(3s^(2)3p^(6)) (3d^(10))(4s^(2))`
`sigma=(2xx1)+(8xx0.85)+(7xx0.35)`
`sigma =2+6.8+2.45`
`sigma =11.25`
` "Hence " ,Z_("eff")=Z-sigma`
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