When does the bond formation between two atoms occur?

Answer:

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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