Compounds Outline

Compounds Outline - CHEMISTRY 120 CHAPTER 4 REVIEW...

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CHEMISTRY 120 – CHAPTER 4 – REVIEW Compounds and Their Bonds Memorize polyatomic ions: NH 4 + ammonium ion, NO 3 - nitrate ion, CO 3 -2 carbonate ion, SO 4 2- sulfate ion, PO 4 -3 phosphate ion, OH - hydroxide ion, CN - cyanide ion. o Charge belongs to the entire group. Duet rule: helium has 2 electrons and is stable. Octet rule: atoms seek to have eight valence electrons. They can share them in bonds. o Metals: lose electrons to obtain a noble gas configuration. Cation: a positively charged ion. The charge of the cation equals the group number. o Non-metals: gain electrons to form an octet. Anion: a negatively charged ion. The charge of the anion equals the group number minus 8. Ionic bonds: formed between a cation and an anion. (Includes polyatomic ions.) o Ionic compounds: solids at room temperature have high melting/boiling points. o Nomenclature: name the cation first, then the anion whose name ends in –ide. o
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This note was uploaded on 04/10/2008 for the course CHEM 231 taught by Professor Hanover during the Spring '08 term at Lansing.

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Compounds Outline - CHEMISTRY 120 CHAPTER 4 REVIEW...

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