Senior Chemistry

KEY CONCEPTS:A=represents the CENTRAL ATOMX=represents the number of surrounding atomsE=represents the number of unshared electrons surrounding the CENTRAL ATOM2 Regions of High Density ElectronsAX2 - Linear3 Regions of High Density ElectronsAX3 = trigonal planar AX2E = Bent4 Regions of High Density ElectronsAX4 = tetrahedral AX3E = Trigonal pyramidal AX2E2 = Bent5 Regions of High Density ElectronsAX5 = Trigonal bipyramidalAX4E = Seesaw AX3E2 = T-shaped AX2E3 = Linear6 Regions of High

KEY CONCEPTS:1. Draw the Lewis structure for the molecule or ion.2. Count the total number of regions of high electron density (bonding and unshared electron pairs) around the central atom. * Double and triple bonds count as ONE REGION OF HIGH ELECTRON DENSITY. * An unpaired electron counts as ONE REGION OF HIGH ELECTRON DENSITY. * For molecules or ions that have resonance structures, you may use any one of the resonance structures. 3. Identify the most stable arrangement

KEY CONCEPTS: The following video looks at an introduction to VSPER Theory. We look at what is required for us to identify the shape of the following compound.

KEY CONCEPTS: The following video looks at an introduction to VSPER Theory. We look at what is required for us to identify the shape of the following compound.