When does the bond formation between two atoms occur?


Bond formation between two atoms occurs only when there is an overall decrease in the energy of the system.

Formation of chemical bond

  • The bond formation is accompanied by the lowering of the energy of the system.
  • In the case of the atoms where electron transfer is to favoured energy consideration, a chemical bond may be formed in some manner which may also lead to lowering the energy of the system.
  • When an atom or molecule is adsorbed on a surface new electronic states are formed due to the bonding to the surface.
  • On the bond formation, the atomic orbitals overlap, and the greater the overlap, the stronger the bond.
  • In certain respects, this localized picture of a chemical bond is equivalent to the molecular orbital theory’s delocalized picture.

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