CHE 2A Lecture Notes - Lecture 15: Boron, Chemical Species, Oxidation State

• School: UC-Davis
• Department: Chemistry
• Course: CHE 2A
• Professor: Melekeh Nasiri

Document Summary

Che2a lecture 15 lewis theory of bonding; the shape of molecules. It is typically a noble gas configuration with eight valence electrons sometimes called an octet. Lewis symbol: shows all the valence electrons of the atom, commonly written for main group elements and much less often for transition elements, the chemical symbol stands for the nucleus and the core electrons. Single covalent bond: sharing of a single pair of electrons between two bonded atoms, held together by the attractive and repulsive electrostatic forces, ex: Bond pair http://www. peoi. org/courses/coursesen/chem/fram4. html: pair of electrons that participate in bonding. Lone pair: pair of electrons that does not participate in bonding. Bond length: the bond distance at which the molecule has its lowest potential energy. Coordinate covalent bond: covalent bond between two atoms, with one atom contributing both electrons of the shared pair, ex: Double covalent bond http://googlegalaxyscience. com/coordinate-covalent-bond-dative: the bonded atoms share two pairs of electrons, ex: http://www. peoi. org/courses/coursesen/chem/fram4. html.