9compounds - Types of Compounds Glenn V Lo Department of...

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    Types of Compounds Glenn V. Lo Department of Physical Sciences Nicholls State University
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    Ionic Compound Usually solids at room temperature and  have high melting points Has cations and anions arranged in a  regular pattern (“crystal lattice”) http://www.chem.ox.ac.uk/icl/heyes/structure_o
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    Molecular Compound could be solid, liquid, or gas at room  temperature Has molecules, which may be oriented  every which way (liquid, gas or  amorphous solid) or in a regular pattern  (in solid crystal lattice) 
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    How to tell? Formulas for ionic compounds are  generally written starting with the  symbol for a metal or NH 4 If the formula starts with NH 4 , that  means the compound is ionic and  the cation is ammonium (NH 4 + ), a  polyatomic ion.
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    Test Yourself Classify the following compounds as  ionic or molecular NaCl C 6 H 12 O 6 MgCO 3 CH 3 CH 2 OH (NH 4 ) 2 SO 4 Fe(NO 3 ) 2
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This note was uploaded on 06/11/2009 for the course CHEM 105 taught by Professor Wessel during the Spring '08 term at Nicholls State.

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9compounds - Types of Compounds Glenn V Lo Department of...

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