See examples of ChemSense in action in our partner classrooms and in teacher workshops, and sample curriculum activities . Taken together, these dimensions begin to portray the molecular world imagined by chemists to account for observable phenomena. All involve changes in molecular and supramolecular structure that correspond to critical aspects of chemical reactivity. Sample curriculum activities are available. The connectivity of atoms to make molecule structures sits at the core of contemporary chemistry.
Chemical identity is expressed in terms of the molecular structure.
Chemical reactions, that is, the transformation of one set of compounds to another, are changes in chemical identity and are expressed in terms of connectivity changes. These patterns of connectivity are often associated with certain perceptual qualities of a compound. And chemical changes involve more than changes in connectivity. A complete understanding of chemical reactivity also involves understanding the changes in spatial relationships that accompany chemical change changes in shape. Sometimes, changes in shape influence greatly the understanding of the chemical process.