Calculate the electronegativity difference and classify each...

Calculate the electronegativity difference and classify each of the following bonds as nonpolar covalent, polar covalent, or ionic:
a. $\mathrm{C}-\mathrm{N}$
b. $\mathrm{Cl}-\mathrm{Cl}$
c. $\mathrm{K}-\mathrm{Br}$
d. $\mathrm{H}-\mathrm{H}$
e. $\mathrm{N}-\mathrm{F}$

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Key Concepts

Bond Polarity

Bond polarity refers to the separation of electrical charge over the atoms involved in a bond. When there is a significant difference in electronegativity between the bonding atoms, a dipole is created, resulting in a polar bond, whereas a minimal difference leads to a nonpolar bond.

Electronegativity Difference

Electronegativity difference is the numerical difference between the electronegativity values of two atoms in a bond. This difference indicates how strongly each atom attracts the shared electrons and determines whether the electron sharing is equal (nonpolar covalent), moderately unequal (polar covalent), or very unequal (ionic).

Types of Chemical Bonds

Chemical bonds are classified based on how electrons are distributed between atoms. Nonpolar covalent bonds occur when electrons are shared equally, polar covalent bonds involve an uneven sharing of electrons, and ionic bonds form when the difference in electronegativity is so large that electrons are transferred from one atom to another.

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