CHEM 107 Lecture 14: 2-7-17-Compounds

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7 Feb 2017
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2-7-17-Compounds
Tuesday, February 7, 2017
10:59 AM
Forming ionic compounds (chapter 5.5)
Naming Compounds (5.6-5.10)
2 Types of Compounds
-Ionic
-metal and nonmetal
-electrons are transferred
-Molecular
-nonmetal and nonmetal
-electrons are shared
Forming Ionic Compounds
-Metal + Nonmetal
***Metal always comes first
-Metals are cations
-Nonmetals are anions
Would K and O form an ionic compound? What would the ionic compound be?
Step 1: Do you have a metal + nonmetal
Step 2: What ions do these atoms form?
K+ and O2-
Step 3: What compound is formed?
-you can cross the charges… K2O
What Ionic compound is formed between magnesium and oxygen?
Mg2+ + O2- = Mg2O2 = MgO
What ionic compound is formed between Cr6+ and O2-
CrO3
Why don't you simplify molecular formulas?
-Subscripts in ionic compound formulas get simplified
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