Lewis dot stuctures and hybridization are approx. of the bonding formula that match the reality. The calculations are including bond lengths, angles, atomic charges ,the dipole moment, bond orders, and molecular orbital energies. The best way to described this bonding is presented by formal electron pair localised bond and the hybridizationof the atomic orbitals used to form these localised bonds.
I'm not much of a physics man, but try this site to learn how to construct the diagram:
http://www.stolaf.edu/depts/chemistry/c ... /js/lewis/