CHEM 20A Chapter Notes - Chapter 3: Electric Potential Energy, Alkali Metal, Covalent Bond
13 Dec 2017
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Condensed structural formula: specifies which atoms in a molecule are bonded to each other and by what types of bonds they are connected: lewis model: ex. Lewis model defines each bond as a pair of electrons localized between two particular atoms and represents structural formulas using lewis dot diagrams. Ball-and-stick models in which the balls represent the atoms and the sticks represent the bonds between them (length & angle) Electrostatic potential energy diagram (elpot): representation of the potential energy measured by a small positive text charge as it scans across the surface of the electron density of a molecule. Isomers: compounds that have the same molecular formula, but different molecular structure and therefore different properties. Ex. sodiu(cid:373) (cid:272)hloride (cid:272)o(cid:374)tai(cid:374)s (cid:374)ot (cid:862)a (cid:373)ole(cid:272)ule of nacl(cid:863) (cid:271)ut rather a for(cid:373)ula u(cid:374)it of. 3. 2: the properties of elements naturally display certain regularities; enables the classification of the elements into families whose members have similar chemical and physical properties.
