Chapter 5 Chemistry Notes

Chapter 5 Chemistry Notes

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Unformatted text preview: tions of atoms that function together as a ionic group. These groups are called polyatomic ions. The molecular formula of oxalic acid is C2H2O4 Two illustrations of oxalic acid molecules: O Chemical Formula (continued III) The simplest whole number ratio is the empirical formula. CHO2 What is it made of & how is it put together? Ethylene glycol Red O White H C2H6O2 Black C Use the Periodic Table to help determine charge: A salt with lithium cations and carbonate (CO32-) anion . Li2CO3 Molecules are nonmetals bonded together Notice cause and effect: compounds are constant composition by mass because they are composed of atoms in fixed ratios. Classifying Elements & Compounds • Atomic elements are elements whose particles are single atoms • Molecular elements are elements (nonmetals) whose particles are multi-atom molecules. • Molecular compounds are compounds whose particles are molecules made of 2 or more different nonmetal atoms connected by bonds. • Ionic compounds are compounds whose particles are cations (+x) and anions (-x...
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This note was uploaded on 02/04/2014 for the course CHEM 004:007 taught by Professor Russellarsen during the Fall '13 term at University of Iowa.

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