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Chemical, Bonding, ▪ Polarity of Bonds, ▪ VSEPR Theory

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Polarity of Bonds, ➢ The existence of a hundred percent ionic or covalent bond represents an ideal, situation. In reality no bond or a compound is either completely covalent or, ionic., ➢ Non-polar covalent Bond : When the shared pair of electron is situated at, the center of the covalent bond, the bond is, called non-polar covalent., , ➢ Polar covalent Bond : When the shared pair of electron is displaced more, towards the one of the atom then it is called polar, covalent bond.

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➢ Dipole moment : It is defined as the product of the magnitude of the charge and, the distance between the centres of positive charge and negative charge., •, •, •, , It is designated by ‘µ’., Its unit is Debye (D)., Dipole moment (µ) = Charge (Q) × Distance of separation (r)., , •, , It gives the ideal of amount of polarity of the covalent bond.

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Fagan's Rule, ➢ It discussed about the partial covalent character of ionic bond.

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VSEPR Theory, , • The repulsive interaction of electron pairs decrease in the order :, •, , Lone Pair (L.P.) – Lone Pair (L.P.) > Lone Pair (L.P.) – Bond Pair (B.P.) > Bond Pair (B.P.) – Bond Pair (B.P.)

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VSEPR Theory, ❖ Electron Pair (E.P.) :