Charge cloud model, tangent sphere model, and VSEPR model have been discussed. These models, although essentially qualitative in nature, have been extremely helpful as interpretive tools. Basic assumptions in the charge cloud, the tangent sphere and VSEPR models have been given. In comparing these models, attempt has been made to bring out clearly their similarities and differences. A short summary and conclusions (for Part 1 and II) are given at the end of this paper.