<p>In&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><msub><mi>H</mi><mn>3</mn></msub></math>&nbsp;the atomic dipole and bond dipole are in the opposite directions, whereas in&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><msub><mi>F</mi><mn>3</mn></msub></math>&nbsp;these are in the same direction</p>