ChemicalEquationsandFormulas

ChemicalEquationsandFormulas - Learning Chemical Formulas...

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Learning Chemical Formulas
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Simple Ionic Compounds Concept: Ionic Formulas are formed from positive and negative ions. Fact 1: Positive ions are formed by metals that lost electrons. Examples: Na 1+ Mg 2+ A 3+ P 4+
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Simple Ionic Compounds Fact 2: Negative ions are formed by nonmetals that gained electrons. Examples: Cl 1- O 2- N 3- Si 4-
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Simple Ionic Compounds Fact 3: The overall charge of ionic compounds must equal zero. Examples : Na 1+ Cl 1- Ca 2+ Br 1- Al 3+ O 2-
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Lesson Two--Polyatomic Ion Formulas Concept: Polyatomic ions are groups of atoms that behave as one unit. Fact 4: Some ions have more that one atom but their overall charge can be determined. Examples: (SO 4 ) = S +6 and O -8 = -2 (NO 3 )= N +5 and O -6 = -1 (NH 4 ) = N -3 and H +4 = +1
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Polyatomic Ion Formulas Fact 5: These group ions, polyatomic ions, are treated like single ions in formulas, but must have parentheses when more than one is used in a formula. Examples: Ca 2+ (NO 3 ) 1- 2 Ga 3+ (SO 4 ) 2- (NH 4 ) 1+ 2 O 2-
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Polyatomic Ion Formulas Fact 6: The polyatomic ions are named based on the atoms
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This note was uploaded on 11/09/2011 for the course CHEM 100 taught by Professor Sdfsdf during the Winter '08 term at BYU.

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ChemicalEquationsandFormulas - Learning Chemical Formulas...

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