Briefly explain polarity of a covalent bond.

Expert Solution

polarity of covalent bond depends on electronegativity of atoms .

if the electronegativity difference between covalent bonded atoms more than 0.5 the covalent bond is called

polar-covalent bond . if the electronegativity difference between bonded atoms more than 1.8 that is called ionic bond

if the electronegativity difference between bonded atoms is zero the covalent bond is non-polar covalent bond.

suppose : some elements electronegativities and bonding

Li (1.0) , C (2.5) , H (2.1) , Cl (3.0 ) , F (4.0) , O (3.5)

now the bond between Li and Cl is ionic because EN difference = 3.0 - 1.0 = 2.0 . it is more than 1,8

the bond between C and H is non-polar covalent bond because EN difference = 2.5-2.1 = 0.4 . it is less than 0.5

the bond between Cl and Cl is non-polar covalent bond because EN difference = 3.0 -3.0 = 0.

the bond between O and H is polar covalent bond because EN difference = 3.5 -2.1 = 1.4

queen_honey_blossom answered 2 years ago

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