Ionic radii are
A. inversely proportional to effective nuclear charge
B. inversely proportional to square of effective nuclear charge
C. directly proptional to effective nuclear charge
D. directly proportional to sqaure of effect nuclear charge

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1 Answers

Correct Answer - A
`"Ionic radii"prop (1)/(Z_("eff"))`
` Z_("eff") to "effective nuclear charge"`
Thus `Z_("eff")` is calculated as follows:
`Z_("eff") = Z- " screenig constant" (sigma)`
This value of screening constant is based upon the number of electrons in valence shell as well as in penultimate shells.

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