H-O-H
Well, the hydrogens bring a total of two valance electrons to the mix and the oxygen contributes six, so the total valance electrons = 8
4 are used in the two bonds, so 8 - 4 = 4
Two lone pair, one above and one below the oxygen in the Lewis dot structure.
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The central atom in H20 is the oxygen atom, 'O'. The oxygen atom has 2 lone pairs of electrons around it, and each lone pair has 2 electrons in it.
8 valence electrons are in the electron-dot structure of H2O. There are 2 from hydrogen and 6 from oxygen.
Oxygen has one bonding pair with each H atom, so two bonding pairs in total, and two lone pairs of electrons surrounding its central position.
angular with 109.5 degree
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.
linear
Boron trichloride is an inorganic compound that is a valuable reagent in organic synthesis. It has zero lone pairs on the central atom.
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.