WHY DO ATOMS FORM CHEMICAL BONDS? 0R WHY DO ATOMS REACT?
Answer: Atoms combine with each other through chemical bond to gain stability. Atoms achieve stability by attaining electronic configuration of noble gases (He, Ne or Ar, etc) i.e. ns2 np6. Having 2 or 8 electrons in the valence shell is sign of stability. Other atoms except noble gases have unstable electronic configuration. So atoms form chemical bond to get an electronic configuration of noble gases to become stable.