what is Balance bond theory and describe s-s and p-p overlapping ?

Answers (1)

Valence bond theory describes a covalent bond as the overlap of half-filled atomic orbitals (each containing a single electron) that yield a pair of electrons shared between the two bonded atoms. We say that orbitals on two different atoms overlap when a portion of one orbital and a portion of a second orbital occupy the same region of space. According to valence bond theory, a covalent bond results when two conditions are met:

  • An orbital on one atom overlaps an orbital on a second atom.

  • The single electrons in each orbital combine to form an electron pair. 

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