CHEM 1201 Chapter : Chem Ch9
Document Summary
Lewis structures simply show the number and types of bonds in a molecule but in reality the actual arrangement of cl atoms are at the corners of a tetrahedron. Vsepr (valence-shell electron-pair repulsion) model: used to predict the shapes of different molecules. Each electron is trying to stay as far from the others as possible. Electron domain: where electrons are most likely found. Bonding pair: domain where electrons are shared between two atoms. Polarity of a molecule is determined by what is bonded to the central atom and the symmetry of the molecule. Bond dipoles that are equal in magnitude but opposite in direction cancel each other. Valence bond theory uses atomic orbitals to explain bonding and to account for molecular geometry. Bonding occurs when the valence atomic orbital of one atom shares space, or overlaps, with the valence atomic orbital of another atom. Hybrid orbitals: atomic orbitals on an atom mix to form new orbitals called hybrid orbitals.
