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Calculate z("eff") for last valece s...

Calculate `z_("eff")` for last valece shell electrons in fluroine (f) Give answer after multiphying by 10.

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The correct Answer is:
52
`F to (1s^(2))(2s^(2)2p^(2))`
`sigma =6xx0.35+2xx0.85=3.8`
`Z_("eff")= 9-3.8=5.2`
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