How do I add a charge to an atom?
Chem3D builds models based on the information in the Atom Types table. If the atom type is not already defined, you need to define the atom with the charge in the Atom Types table. See the manual for defining a new atom type. Once defined, you can replace a selected atom with the new atom type. To do so, type the new atom type in the text replacement box, and double click on the atom to be replaced.