* Electronegativity difference: Carbon (C) has an electronegativity of 2.55, while Nitrogen (N) has an electronegativity of 3.04. This difference in electronegativity means that Nitrogen attracts the shared electrons in the bond more strongly than Carbon.

* Unequal sharing of electrons: Due to the electronegativity difference, the electrons in the C-N bond are pulled closer to the Nitrogen atom, creating a partial negative charge (δ-) on the Nitrogen and a partial positive charge (δ+) on the Carbon.

* Dipole moment: This uneven distribution of charge results in a dipole moment, where one end of the bond is slightly negative and the other end is slightly positive.

Therefore, the C-N bond is considered a polar covalent bond.