Why bond angle of hydrides decrease down the group 16?

1.	Why bond angle of hydrides decrease down the group 16?
Answer» The hydrides of group 16 have tetrahedral geometry. With TWO lone pairs of the ELEMENTS. There is an increase in the bond angle as we move down the group because -The ELECTRON negativity of elements decrease as we move down. -The lone PAIR - bond-pair repulsion is stronger is than lone pair-lone pair or bond pair bond-pair interaction. -But as the electronegativity decreases, the repulsion also decreases which RESULTS in a decrease in bond angle.

Answer»

The hydrides of group 16 have tetrahedral geometry. With TWO lone pairs of the ELEMENTS. There is an increase in the bond angle as we move down the group because

-The ELECTRON negativity of elements decrease as we move down.

-The lone PAIR - bond-pair repulsion is stronger is than lone pair-lone pair or bond pair bond-pair interaction.

-But as the electronegativity decreases, the repulsion also decreases which RESULTS in a decrease in bond angle.

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Why bond angle of hydrides decrease down the group 16?

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