Answer:
See below
Explanation:
No ionic bond can ever be 100% ionic and 100% covalent bonds do not exist either except for those between two identical atoms.
Electron density in covalent bonds shifts toward the more electronegative atom, producing partial charges on each atom creating a dipole.
Electron clouds are easily polarized, affecting the electrical balance of atoms, ions, or molecules. Large negative ions are readily polarized by small positive ions, increasing the covalent character of the bond between them.
The reason why chemical bonds are neither 100% ionic or 100% covalent is because electron transfer or sharing is never complete.
In chemistry there are two bonding extremes in compounds; Ionic bonds and covalent bonds. Ionic bonds involve a transfer of electrons from one atom to another while covalent bonds involves a sharing of electrons between atoms.
However, in a chemical compound, electrons are not completely transferred and electrons are not completely shared. This depends on the electronegativity of each of the atoms involved. Electron transfer or electron sharing in compounds is never complete. Hence, for every compound, there is a certain percentage of each kind of bond present.
According to Linus Pauling, in every ionic bond there is a certain percentage of covalent character and in every covalent bond there is a certain percentage of ionic character.
Therefore, Hcl is not 100% covalent and Nacl is not 100% ionic.
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