[CHEM 1AA3] - Final Exam Guide - Ultimate 45 pages long Study Guide!

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1AA3
• Professor: Pippa Lock

Document Summary

Three types of interactions occur when bringing together two atoms together: electrons are attracted to the two nuclei, the electrons repel each other, two nuclei repel each other. Negative energies correspond to a net attractive force between the atoms. At a particular internuclear distance, the potential energy reaches its lowest value form a covalent bond. This internuclear distance corresponds to the bond length. Potential energy corresponds to the negative of the bond-dissociation energy. Valence-bond method a description of covalent bond formation in terms of atomic orbital overlap. Gives a localized electron model of bonding: core electrons and lone-pair valence electrons retain the same orbital locations as in the separated atoms. Charge density of the bonding electrons is concentrated in the region of orbital overlap. Different bond energies for different bonds; 1s-1s overlap in h2 produces a greater bond energy than the 1s-3p overlap in a h-s bond in h2s.