The anomalous behaviour of first element of s and p block elements of each group as compared to other group members is due to following reasons:

Small size of atom

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Large charge/radius ratio

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High electronegativity and non availability of d-orbitals in their valence shell

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All of the these

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Solution

The anomalous behaviour of first element of s and p block elements of each group as compared to other group members is due to following reasons: Small size of atom, large charge/radius ratio, high electronegativity and non availability of d-orbitals in their valence shell.

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Similar questions

The first member of each group of representative elements (i.e., s and p - block elements) shows anomalous behaviour. Illustrate with two examples.

[B F_{4}]^{-}

[A l F_{6}]^{3 -}

s -

p -

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