A stands for the central atom X stands for an atom attached to the central atom E stands for a lone electron pair on the central atom
AX2
AX3
AX2E
AX4
|
AX3E
AX2E2
AX5
AX4E
AX3E2 AX2E3
AX6
|
AX5E
A more complete and animated version of this data bank so as VSEPR course can be found at the reference : G. Dupuis - Lycée Faidherbe de Lille