The properties like ionization potential, electronegativity, electron affinity and power of the catenation of the member in a group depend on many factors. For example, the smaller the size of the atom greater will be the ionization potential. At the same time symmetry in the electronic configuration of the elements also play a part in their ionization energy. Smaller the atomic size, greater will be the mutual electronic repulsion and lesser will be electron affinity. Similarly, the catenation which is a direct result of M - M bond strength is also affected by similar considerations.

The correct decreasing order of catenation among group $16$ elements is _________.

O > S > S e > T e

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S > O > S e > T e

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S > S e > T e > O

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S > S e > O > T e

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Solution

The correct option is B $S > S e > O > T e$
Power of self-catenation generally depends on bond strength (of M - M bond), so the decreasing order of catenation is :

$S$ > $S e$ > $O$ > $T e$
Bond energy 226 172 142 126
( $k J m o l^{- 1}$ )
The bond energy values generally decrease down the group But because of the very small size and consequent mutual inter electronic repulsion oxygen has lower bond energy than $S$ and $S e .$ Due to the large size, $T e - T e$ bond is the weakest.

Therefore, the correct decreasing order of catenation is-

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