LIFESCI 7A Chapter Notes - Chapter 2.2: Chemical Reaction, Octet Rule, Molecular Orbital
Document Summary
Molecules: groups of two or more atoms attached together that acts as a single uit. Chemical bond: form of attraction between atoms that holds them together. The ability of atoms to form bonds explains why just a few types of element can come together in many different ways to make a variety of molecules that can carry out diverse functions in a cell. A covalent bond results when two atoms share electrons. Valence electrons: electrons in the outermost orbitals of an atom. Molecular orbital: two atomic orbitals each containing one electron merge into a singular orbital containing a full complement of two electrons. Covalent bond: holds the atoms together through the shared pair of electrons. Each hydrogen has a single electron in spherical orbital. When the atoms join into a molecule, the two orbitals merge into a single molecular orbital containing two electrons that are shared by the hydrogen atoms.
