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Explain Valence Bond Theory....

Explain Valence Bond Theory.

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The covalent bond is formed by overlapping of those orbital which contains unpaired electrons.
When the overlapping is along axis, the overlapping becomes maximum and strong, called as a sigma bond.
During overlapping the electrons present in the valence orbit must have opposite spin.
Covalent molecule have lower energy than combining atoms. Therefore resulting molecule are always stable.
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