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Discuss the salient features of VBT. |
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Answer» Solution :(i) When half FILLED orbitals of two ATOMS overlap, a covalent bond will be formed between them. (ii) The resultant overlapping orbital is occupied by the two electrons with opposite spins. For example, when `H_(2)` is formed, the two 1s electrons of two hydrogen atoms get paired up and occupy the overlapped orbital . (iii) The strength of a covalent bond depends upon the extent of overlap of atomic orbitals . Greater the overlap, larger is the energy released and stronger will be the bond formed. (IV) Each atomic orbital hasspecfic direction (except s -orbital which is spherical )and hence orbital overlap takes place in the direction that maximizes overlap. |
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