The attractive force which holds the two atoms together is called a chemical bond. A covalent bond is formed by an equal sharing of electrons. A coordinate bond is formed by unequal sharing of electrons. An ionic bond is formed by the transfer of electrons from one atom to another. Octet rule, although very useful but is not universally applicable. According to valence bond theory, a covalent bond is formed by overlapping of half-filled atomic orbitals resulting in a lowering of energy and more stability. Bond order is the number of bonds between atoms in a molecule. The higher the bond order more will be stability and bond dissociation enthalpy but the smaller the bond length. The polarity of a covalent bond depends upon the difference in electronegativity. The covalent character of a bond depends upon polarising power, smaller cation and bigger anions have higher polarising power. VSEPR theory helps to predict the shapes of molecules.

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Kossel-Lewis Approach to Chemical Bonding, VSEPR Theory and Geometry of Molecules, Valence Bond Theory for Covalent Bond, Bond Order and Magnetic Properties from MO Theory | PadhAiPro

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CASE_STUDIESKossel-Lewis Approach to Chemical BondingVSEPR Theory and Geometry of MoleculesValence Bond Theory for Covalent BondBond Order and Magnetic Properties from MO Theory5 sub-questions

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