c161l4_09_12 - Ions vs molecules A molecule is an...

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Ions vs. molecules Ions vs. molecules W A molecule is an electrically neutral group of atoms that are held together by chemical bonds. W Molecules exist as discrete entities. It makes sense to discuss a molecule of water or propane W An atom, or group of atoms that gains or loses electrons becomes electrically changed and is called an ion. W An ionic compound is a group of positive and negative ions held together by the electrostatic interaction. Only the ratio is the same from sample to sample
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Examples Examples Molecular Ionic
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Naming Molecular Naming Molecular Compounds Compounds W Figure out which element to name first B, Ge, Si, C, Sb, As, P, N, H, Te, Se, S, I, Br, Cl, O, F
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The first element keeps its name unchanged W The second element takes the suffix -ide W Greek prefixes are used to indicate the number of atoms of each The prefix “mono” or “mon” is omitted except where needed to avoid confusion W Examples N 2 O 5 - Dinitrogen pentoxide SF 6 - Sulfur hexafluoride W Why the difference? NO
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This note was uploaded on 04/05/2008 for the course CHEM 161, 101 taught by Professor Hansell during the Spring '08 term at Rutgers.

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c161l4_09_12 - Ions vs molecules A molecule is an...

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