Which out of nh3 and nf3 has higher dipole moment and why?

Question: Which out of nh3 and nf3 has higher dipole moment and why?

Ammonia (NH₃) has a higher dipole moment than nitrogen trifluoride (NF₃). This is because, in NH₃, the dipole moments of the N-H bonds add together in the same direction as the lone pair on the nitrogen atom, leading to a stronger overall dipole moment. In contrast, in NF₃, the dipole moments of the N-F bonds are partially canceled out by the opposing lone pair's dipole moment, resulting in a lower overall dipole moment. Therefore, despite fluorine being more electronegative than hydrogen, the geometric arrangement in NH₃ causes it to have a higher dipole moment than NF₃.

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