CHM 2110 Lecture Notes - Electron Configuration, Atomic Orbital, Unit
Document Summary
Atom: contains a nucleus composed of protons and neutrons, surrounded by electrons in an electron cloud. Atomic number (z): the number of protons in an atom. All atoms of a given element will have the same z. Mass number (a): the number of protons and neutrons in an atom. Isotopes: atoms of the same element with different numbers of neutrons, but the same number of protons. Atomic mass unit (amu): exactly 1/12 of the mass of 12c (1. 66x10-27kg) Atomi weight: average weighted mass of all naturally occurring isotopes" atoms. Electron shells: electrons are arranged in shells, with varying levels of energy. Molecular weight: sum of all weights of all atoms in molecule. Heisenberg: claims that it is impossible to know the position of e- Schrodinger: the behavior of electrons in an atom can be shown by a wave equation, and the solutions of wave equations are orbitals.
