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Lecture 1 and 2: Structure and Bonding

Lecture 1 and 2: Structure and Bonding - Organic Chemistry...

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Organic Chemistry I CHM 203 Lecture 1 Electronic Structure and Bonding Acids and Bases
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Organic compounds are compounds containing carbon Carbon neither readily gives up nor readily accepts electrons Carbon shares electrons with other carbon atoms as well as with several different kinds of atoms Organic Chemistry
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The Structure of an Atom An atom consists of electrons, positively charged protons, and neutral neutrons Electrons form chemical bonds Atomic number: numbers of protons in its nucleus Mass number: the sum of the protons and neutrons of an atom Isotopes have the same atomic number but different mass numbers The atomic weight: the average weighted mass of its atoms Molecular weight: the sum of the atomic weights of all the atoms in the molecule
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The Distribution of Electrons in an Atom Quantum mechanics uses the mathematical equation of wave motions to characterize the motion of an electron around a nucleus Wave functions or orbitals tell us the energy of the electron and the volume of space around the nucleus where an electron is most likely to be found The atomic orbital closer to the nucleus has the lowest energy Degenerate orbitals have the same energy
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Table 1.1
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The Aufbau principle: electrons occupy the orbitals with
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