No lone pairs
There are 1
If an atom has five valence electrons, it will have one lone pair of electrons.
two bonds and eight lone pairs
Zero
2
Boron trichloride is an inorganic compound that is a valuable reagent in organic synthesis. It has zero lone pairs on the central 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.
There are no lone pairs on the central atom in BCl3 because boron (B) is in group 13 (or 3A) and can have only 3 bonds around it.
There is one lone pair of electrons on the central nitrogen atom in ammonia (NH3).
There are no lone pairs on the central nitrogen atom in the nitrate ion, which is surrounded by three oxygen atoms in a trigonal planar geometry.
In methane (CH4), the central carbon atom does not have any lone pairs of electrons. Instead, it forms four single covalent bonds with the four hydrogen atoms around it.
There are two lone pairs around the central atom (Iodine) in IF5. The molecule has a trigonal bipyramidal shape with one lone pair in the axial position and one in the equatorial position.
There are two lone pairs of electrons on the As atom in AsCl3.
There is 1 lone pair around the central C atom
The lone pairs are on the bromine atom- 3 in all.
There are two lone pairs on the arsenic atom in ASO2.
There is one lone pair of electrons on the central atom (nitrogen) in ammonia.