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The topic overlap is discussed in the following articles:
  • valence bond theory

    TITLE: chemical bonding
    SECTION: Valence bond theory
    ...concept of the electron-pair bond. Broadly speaking, in VB theory a bond between atoms A and B is formed when two atomic orbitals, one from each atom, merge with one another (the technical term is overlap), and the electrons they contain pair up (so that their spins are ↓↑). The merging of orbitals gives rise to constructive interference— i.e., an enhancement of...
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