1. A computer graphics system to display a model of atoms and molecules and to investigate chemical and physical properties of said atoms and molecules comprising: a processor; a controller coupled to said processor to direct operations of said graphics system; a memory coupled to said processor to store dam relative to known atoms and molecules, and intra-molecular forces between atoms in said molecules; a monitor coupled to said processor to provide a display of information and said model of the user selected atoms and molecules from said data in said memory with a three-dimensional technique used by chemists to illustrate a relationship between atoms and molecules, said model displayed as graphical elements representing atoms located at atomic center positions with graphical coordinates of said atomic centers relative to each other stored in said memory, and connecting graphical elements between said atomic centers representing bonds therebetween; and a pointer manipulation device coupled to said processor to provide a user a capability to dynamically model said molecular model by selecting data relative to atoms and molecules from said memory for said model, to conformationally alter a molecular model, and to direct operation of said controller; wherein said controller permits limited movement of an atomic center position with respect to the atomic center positions of other atoms within said model to dynamically model said molecular model by conformationally altering said three-dimensional displayed molecular model in keeping with said intra-molecular forces between atoms of said molecular model under the operation of said pointer manipulation device.