unit 5b compounds and their bonds
DESCRIPTION
Unit 5B Compounds and Their Bonds. Naming and Writing Ionic Formulas. Charges of Representative Elements. Transition Metals. What is this rule?. Correct. Wrong. Na + and Cl - = Na 1 Cl 1 Mg 2+ and Cl - = Mg 2 Cl 1 Al 3+ and Cl - = Al 3 Cl 1 Ca 2+ and P 3- = Ca 2 P 3. - PowerPoint PPT PresentationTRANSCRIPT
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Unit 5BCompounds and Their Bonds
Naming and Writing Ionic Formulas
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Charges of Representative Elements
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Transition Metals
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What is this rule?
Correct Na+ and Cl- = NaCl
Mg2+ and Cl- = MgCl2
Al3+ and Cl- = AlCl3
Ca2+ and P3- = Ca3P2
Wrong Na+ and Cl- = Na1Cl1
Mg2+ and Cl- = Mg2Cl1
Al3+ and Cl- = Al3Cl1
Ca2+ and P3- = Ca2P3
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Writing Ionic Formulas
Use Swap & Drop to get subscripts
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Ions Formulas
cation anion
Na+ Cl-
K+ S2-
Mg2+ O2-
Ca2+ I-
Al3+ O2-
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What is this rule?
Correct Ca2+ and O2- = CaO
Sn4+ and O2- = SnO2
Mg2+ and S2- = MgS
Wrong Ca2+ and O2- = Ca2O2
Sn4+ and O2- = Sn2O4
Mg2+ and S2- = Mg2S2
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Writing Ionic Formulas
Simplify the ratio of subscripts if possible.
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Learning Check – Page 23
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What is this rule?
Correct Iron (III) & O2- = Fe2O3
Tin (II) & Cl- = SnCl2
Copper (II) & F- = CuF2
Wrong Iron (III) & O2- = Fe3O2
Tin (II) & Cl- = Sn2Cl
Copper (II) & F- = Cu2F
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Writing Ionic Formulas
Transition metals can have more than 1 positive charge.
We use Roman numerals to designate the charge.
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Naming Ionic Compounds with Variable Charge Metals
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Learning Check
Write the formulas and names for compounds of the following ions:
Br− S2− N3−
Na+
Al3+
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Naming Variable Charge Metals
Transition metals with two different ions use a Roman numeral after the name of the metal to indicate ionic charge.
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Learning Check
Select the correct name for each.A. Fe2S3
1) iron sulfide 2) iron(II) sulfide 3) iron(III) sulfide
B. CuO 1) copper oxide 2) copper(I) oxide 3) copper(II) oxide
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Solution
Select the correct name for each.
A. Fe2S3
3) iron (III) sulfide Fe3+ S2-
B. CuO
3) copper (II) oxide Cu2+ O2-