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Covalent radius of .(82)Pb is 1.53Å. Cal...

Covalent radius of `._(82)Pb` is `1.53Å`. Calculate its electroneagitity at Allred -Rochow sale .

Text Solution

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We have `(X_(Pb) _(AR)) = 0.744 + (0.359 Z_(eff))/(r^(2))`
`._(82)PB =1s^2 , 2s^2 . 2p^2 . 3s^3 3p^6, 3p^6 underset(60) (3d^(10)) . 4s^2 4p^6 4d^(10) 4f^(14)`
`5s^2 underset(18)(5p^6) 5d^(10) , 6s^2 underset(4) ( 6p^2)`
` sigma = [ 0. 35 xx 3] + [0. 85 xx 18+_ 1.0 xx 60 ] = 7.6 . 35`
and `Z_(eff) = 82.00 - 76. 35 = 5.65, r =153 Å`
`:. (X_(Pb)) _(AR) =0.44 + ( 0. 359xx 5.65) /((1.530^2)) = 1.61` .
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