Question
Anionic bond is an extreme case of a polar covalent bond. Justify.
Solution
According to Pauling, if the difference in electronegativity between the two atoms forming a bond is 1-9 than the bond has equal covalent and ionic character. However, if the difference becomes more than 1 -9 , the ionic character increases while the polar covalent character decreases. For example, the bond between sodium and fluorine is completely ionic because’ the electronegativity difference in sodium (0-9) and fluorine (4, 0) atoms is 3 , 1. On the other hand, the bond between carbon and chlorine is mainly covalent with the very little ionic character because the electronegativity difference in carbon (2 , 0) and chlorine (3, 0) atoms is (0 , 5).
