<p>The electronegativity difference between N and F is greater than that between N and H, yet the dipole moment of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><msub><mi>H</mi><mn>3</mn></msub></math>(1.5 D) is larger than that of&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><msub><mi>F</mi><mn>3</mn></msub></math>(0.2 D). This is because:</p>