SHAPES OF MOLECULES

Hi good afternoon.  I would like to post on  shapes of molecules according to Valence Shell electron pairs Repulsion Theory. This Theory is know as VSEPR . We know shapes of molecules with the help of  this Theory.  The shape of a molecule depends upon the number of Valence Shell electron pairs (bonded or non- bonded) around the central atom. To know shapes of molecules,  we have to know no of bond pairs,  no of Lone pairs and valency electrons.  We can find no of bond pairs from given molecule. We can calculate Valence electrons by locating central atom. From this central atom we can find Valence electrons. We can find Lone pairs from given formula.                                                                                          Lone pairs = Valence electrons- Bond pairs/2