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with the higher electronegativity. An example of a polar covalent bond in

hydrochloric acid. The H atom has the electronegativity of H = 2.1 while that of
Cl = 3.0. This causes the electron pair to be closer to the Cl atom. So that Cl

tends to be negative and H tends to positive.

Figure. Polar covalent bonds in HCl compounds

2. Covalent Non-Polar Bond
Nonpolar covalent compounds are formed between atoms of elements that

have an electronegativity difference of zero or have a dipole moment = 0 (zero)
or have a symmetrical molecular shape. The points of the negative charge of the

common electrons coincide, so that there is no dipole moment in the forming
molecule, in other words that the common electrons get the same attractive

force.

Figure. Non-polar covalent bonds in Cl2 molecules

The bonding pair of electrons is equally attracted to the bonding atoms.
This is because the two Cl atoms have the same electronegativity, in other

words, the electronegativity difference is zero. Because PEI is equally attracted,
the shape of the molecule in the Cl2 compound is symmetrical.

Covalent Compound| 8