What is dipole moment ? Which of the following have more dipole moment, NF³ and NH3 ?
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In NH3, N is more electronegative than H. So, N pulls the electrons from H towards itself and so, the direction of moment due to the N-H bonds is in the same direction as that of the lone pair of electrons on Nitrogen.
In NF3, F is more electronegative than N. So, all F atoms pull the electrons towards themselves. And, this resultant moment is opposite to the directions of that of the lone pair of electrons on the 'N' atom. And, since Dipole Moment is a vector quantity, the net dipole decreases.
And, so we have NH3 whose dipole moment is much higher than that of NF3.
In NF3, F is more electronegative than N. So, all F atoms pull the electrons towards themselves. And, this resultant moment is opposite to the directions of that of the lone pair of electrons on the 'N' atom. And, since Dipole Moment is a vector quantity, the net dipole decreases.
And, so we have NH3 whose dipole moment is much higher than that of NF3.
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the product of positive or negative charge and the distance between two poles is called dipole moment...
NH3>NF3-DIPOLE MOMENT
NH3>NF3-DIPOLE MOMENT
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