F05L07_6 - VI Ions and Ionic Compounds A. Ion a charged...

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1 VI Ions and Ionic Compounds A. Ion – a charged particle formed by the addition or removal of electrons from a given atom 1. Cations – positively charged ions formed by removal of electrons 2. Anions – negatively charged ions formed by addition of electrons 3. In general, metal atoms tend to lose electrons; nonmetal atoms tend to gain electrons. BLB, fig 2.22 – periodic table 4. Pr. Ex. 2.7 BLB, p56 How many protons and electrons does the Se 2- ion possess? 5. Polyatomic ions – consist of atoms joined like a molecule, but having an overall positive or negative charge. a. Atoms of a polyatomic ion do not dissociate in solution!! b. Key polyatomic ions: mercury(I) ammonium sulfite sulfate phosphate chromate dichromate peroxide carbonate permanganate nitrate perchlorate chlorate acetate hydroxide cyanide Symbol Ion Name Symbol Ion Name B. Predicting Ionic Charges 1. An atom or molecule can lose or gain more than one electron. 2. Many atoms gain or lose enough electrons
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This note was uploaded on 03/12/2010 for the course CHEM 140 taught by Professor Ferrence during the Fall '08 term at Illinois State.

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F05L07_6 - VI Ions and Ionic Compounds A. Ion a charged...

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