CHEM 212 Lecture Notes - Lecture 1: Molecular Orbital Diagram, Ethylene, Lone Pair
17 Jun 2015
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Chem 212: introductory organic chemistry 1 lecture 1: organic structure-- bonding and molecular structure. Atom is made of electron cloud and nucleus. Rutherford model of the atom (1911) - small, positively charged nucleus (contains much of the atom"s mass) is orbited by low-mass electrons. Atomic weight - measured mass of an atom ( usually not whole number because of isotopes. Isotopes: atoms with the same number of protons (atomic number), but different number of neutrons (mass number) Electrons are not really orbiting particles, instead, they are treated as waves. The schr dinger ( wave ) equation: (electrons behave as a particle and as a wave) Atomic orbital region (volume) in space where probability of finding an electron (of a specific energy) is very high (90 95 %), no fixed orbits. 1s orbital is spherical shape--no nodal plane or nodal surface; 2s orbital has a nodal surface with both and 2 equal 0; 2p orbital has a nodal plane.
