why bond angle of hydrides decrease down the group 16?
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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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Answer:
The Bond Angle decrease as we move down the16 group. refer to photo
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