Covalent bonding – Ionic bonding

Two principally different ways to achieve noble gas structure, actually no sharp border between these two types of bonding.

Ionic bonding

 Ionic bonding

Covalent bonding

Covalent bonding

Difference in electronegativity::

≤ 0.5 nonpolar covalent bond
0.5 < 1.9 polar covalent bond
≥ 1.9 ionic bond

Difference in electronegativity between bonds
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