SHAPES OF MOLECULES CONTAINING TWO ELECTRON PAIRS, SHAPES OF MOLECULES CONTAINING THREE ELECTRON PAIRS:
SHAPES OF MOLECULES CONTAINING TWO ELECTRON PAIRS: Two bond pair of electrons without any lone pair of electrons around central atom have linear arrangement because it is the only arrangement in which two bond pairs of electrons have minimum repulsion between them. Bond angle in linear molecules is 180 0 e.g; Becl 2 . Electron pairs in multiply bond are assumed to occupy the position of one electron pair as in a single covalent bond e.g; O=O H-C = N SHAPES OF MOLECULES CONTAINING THREE ELECTRON PAIRS: When there are three pairs of electron around the central atom, the bond lie in the same plane at an angle of 120 0 to one another. This arrangement have maximum separation and maximum repulsion between them. The shape for such molecules is trigonal planar e.g; BF 3 . In case of SO2 molecule, sulpher atom has the central position. It has six electrons in its valence shell out of these two electrons are covalently b...