* Electronegativity: Nitrogen and chlorine are both nonmetals, and their electronegativity difference is not large enough to form an ionic bond.

* Sharing of Electrons: In NCl₃, nitrogen and chlorine share electrons to form covalent bonds. This sharing creates a stable octet for both elements.

Important Note: While NCl₃ is covalent, it is considered a polar covalent compound. This is because chlorine is more electronegative than nitrogen, leading to a slight separation of charge within the molecule.