No lone pairs on the N in the nitrate anion (NO3^-)
Two lone pair
There is one lone pair of electrons on the nitrogen atom.
Every pair of electrons on the central atom (S) of the Lewis structure of SF6 is shared by an F atom, so therefore there are no lone pairs on the central atom.
The Central atom has no lone pairs in CH4
1
Two lone pair
1
There is one lone pair of electrons on the nitrogen atom.
There is one lone pair of electrons on the nitrogen atom.
No lone pairs
One lone pair. The central atom is N (nitrogen) which has 5 valence electrons. Three of them are shared with 3 hydrogen atoms, leaving 2 electrons (1 lone pair) on the N.
There are 2 non bonding pairs in a nitrogen molecule
In NF3, the Nitrogen atom has 5 valence electrons and each Fluorine atom shares 1 more electron with Nitrogen. That makes 8 electrons (4 pairs of electrons) around Nitrogen. Betweent the four electron pairs, 3 pairs are bonded with Fluorine and the other one is a lone pair. Therefore around the central atom Nitrogen, there are three Fluorine atoms and a lone electron pair.
0
Every pair of electrons on the central atom (S) of the Lewis structure of SF6 is shared by an F atom, so therefore there are no lone pairs on the central atom.
Boron trichloride is an inorganic compound that is a valuable reagent in organic synthesis. It has zero lone pairs on the central atom.
The Central atom has no lone pairs in CH4