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Using Slater's rule calculate the effect...

Using Slater's rule calculate the effective nuclear charge on a 3p electron in aluminium and chlorine .Explain how these results relate to the atomic radii of the two atoms.

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`ubrace(Al^(13) 1s^(2))_((n-2)) ubrace(2s^(2) 2p^(6))_((n-1))ubrace(3s^(2) 3p^(1))_((n))`

`:.` Effective nuclear change =Z-S=13-9.5
`(Z_(eff))_Al=3.5`
Electronic Configuration of chlorine
`ubrace(1s^(2))_((n-2)) ubrace(2s^(2) 2p^(6))_((n-1)) ubrace(3s^(2) 3p^(5))_((n))`

`:.` Effective nuclear charge =Z-S=17=10.9
`(Z_(eff))_Cl=6.1`
`(Z_(eff))_Clgt(Z_(eff))_Al` and hence `r_(Cl) ltr_(Al)`
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