NH4 polar or nonpolar

Answer 1

NH3 is a polar molecule.

In NH3 nitrogen is bonded to each hydrogen by a single covalent bond and nitrogen being more electronegative pulls the shared pair of electrons toward itself. This gives NH3 polar bonds. One may think if NH3 has triangle shape with N at the centroid then resultant should be zero (following vector addition as dipole moment is a vector). But NH3 is not triangular; it is, rather, trigonal pyramidal due to repulsion between bond pairs and a lone pair. The three H atoms lie on the triangular base of the pyramid and the lone pair lies on the vertex. So NH3 acquires a net dipole moment in the direction of lone pair, which makes it a polar molecule. Dipole moment of NH3 is 1.46D(D-debye, 1D=3.33 *10-30 coulomb metre).

Answer 2

non-polar, because the dipole moment is zero. If u look at the Lewis dot diagram, there's no lone pair on the N atom.

The structure is tetrahedral with N at the centre, so it has no dipole but, it has used an electron to bond with the hydrogen which leaves it with a positive charge so, it would dissolve in water or any other polar solvent.

You should write it like this "NH4+"

Answer 3

polar!