CHEM 1035 Chapter Notes -Octet Rule, Lone Pair, Unpaired Electron
11 Mar 2014
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Chapter 10 the shapes of molecules (all sections) The first half of this chapter deals with writing. Lewis electron dot structures (lewis structures) for molecules and polyatomic ions. The second half of the chapter deals with the shape and polarity of molecules, which require. Suggested steps in creating a lewis structure (1) write electron dot symbols for the atoms in the structure and add up the valence electrons. All of these valence electrons must be used in the. Lewis structure. (2) place the atom present in smaller quantity as the central atom. (this is usually the one with lower electronegativity. ) For example, in clf3, cl is the central atom; in s2cl2, the s atoms are the central atoms. (3) hydrogens are always peripheral atoms (never central atoms). Carbons are always central atoms (never peripheral atoms). (4) hydrogens always have two electrons around them in lewis structures.
