CHEM 121 Notes on Chemical Bonds

It has allowed chemists to advance from the simple

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Unformatted text preview: It has allowed chemists to advance from the simple picture that covalent and ionic bonding affords to a more complex model based on molecular orbital theory. Molecular orbital theory postulates the existence of a set of molecular orbitals, analogous to atomic orbitals, which are produced by the combination of atomic orbitals on the bonded atoms. From these molecular orbitals we can predict the electron distribution in a bond about the atoms. Molecular orbital theory provides a valuable theoretical complement to the traditional conceptions of ionic and covalent bonding with which we will start our analysis of the chemical bond. Terms Anion - A negatively charged ion. Bond - That which holds together atoms in molecules and ions in lattices. Cation - A positively charged ion. Coulomb's Law - A mathematical formula whose consequence is that negatively and positively charged particles attract each other and similarly charged species repel each other. Covalent Bond - A bond that results from a sharing of electrons between nuclei. Ion - A charged species created by the gain or loss of an electron from an atom or neutral molecule....
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