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Unformatted text preview: uction always occur together  The species that accepts electrons is called the oxidizing agent  The species that donates electrons is called the reducing agent Oxidization Numbers: represent the “formal charges” • The O.N. of an element in an elementary substance is 0 • The O.N. of an element in a monatomic ion equals the charge of the ion • Certain elements have the same O.N. in almost all of their compounds 1. Group 1 metals (Li, Na, K, …) always exist as +1 ions, hence they always have the O.N. +1. 2. Similarly, group 2 metals (Be, Mg, Ca, …) always have O.N. +2. 3. Fluorine always has O.N.  1 4. Oxygen has O.N.  2 5. Hydrogen has O.N. +1 • The sum of the O.N. in a neutral species is 0, in a polyatomic ion, it...
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This note was uploaded on 02/13/2014 for the course CHEM 1024 taught by Professor Dr.zhifengding during the Winter '12 term at UWO.
 Winter '12
 Dr.ZhifengDing
 Chemistry, Atom, Mole, Stoichiometry

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