Unit 4 Ions and Ionic Compounds
Key Terms
ion ion name formula unit
cation octet rule variable charge metal
anion ionic bond polyatomic ion
ion symbol ionic compound
Problem Checklist
1.1. Write the ion symbol and ion name given the number of protons and electrons, and vice versa.
1.2. Use the octet rule to predict the ions formed by the representative elements (Group A
elements).
1.3. Describe the formation of an ionic bond and an ionic compound.
1.4. Predict the formula for an ionic compound given the two elements involved.
1.5. Write the name of a simple ionic compound given the formula, or the formula give the name.
1.6. Know which elements are variable charge metals and write their ion names.
1.7. Write the name or formula for an ionic compound that contains a variable charge metal.
1.8. Given an “ate” polyatomic ion, write the “ite” form and the “bi” form.
1.9. Write the name or formula for an ionic compound that contains a polyatomic ion.
Textbook Practice Problems
Textbook Section Page # Questions
6.1 Ions: Transfer of Electrons p.178 6.1, 6.3, 6.5, 6.7, 6.9, 6.11, 6.13
Understanding the Concepts p.214 6.97, 6.99
Additional Practice Problems p.215 6.113, 6.151
6.2 Ionic Compounds p.182 6.15, 6.17, 6.19
Understanding the Concepts p.215 6.101(not f&g)
Additional Practice Problems p.215 6.115, 6.153(not c)
6.3 Naming and Writing Ionic Formulas p.185 6.21, 6.23, 6.25, 6.27, 6.29, 6.31, 6.33
Understanding the Concepts p.215 6.103
Additional Practice Problems p.216 6.119
6.4 Polyatomic Ions p.190 6.35, 6.37, 6.39, 6.41, 6.43, 6.45(not a)
Additional Practice Problems p.216 6.117
Chapter 6 Answers p.218
, Unit 4 Ions and Ionic Compounds
Contents
6.1 Ions: Transfer of Electrons ....................................................................................................................... 3
Stable Electron Configurations .................................................................................................................. 3
6.2 Ionic Compounds .................................................................................................................................... 6
Chemical Formulas of Ionic Compounds................................................................................................... 7
6.3 Naming and Writing Ionic Formulas........................................................................................................ 8
Metals with Variable Charge ..................................................................................................................... 9
Determination of Variable Charge .......................................................................................................... 10
Ion Charges, Periodic Table ..................................................................................................................... 11
Naming Ionic Compounds with Variable Charge Metal Ions .................................................................. 11
Writing Formulas from the Name of an Ionic Compound ...................................................................... 12
6.4 Polyatomic Ions ..................................................................................................................................... 12
Naming of Polyatomic Ions ..................................................................................................................... 13
Writing Formulas Containing Polyatomic Ions ........................................................................................ 14
Naming Ionic Compounds Containing Polyatomic Ions .......................................................................... 15
, 6.1 Ions: Transfer of Electrons
Stable Electron Configurations
Fact:
• Noble gases, such as helium, neon, and argon are
inert,
• They undergo few if any chemical reactions.
Theory:
• The inertness of noble gases results from their
electron structures.
• each (except helium) has an octet of electrons in
its outermost shell.
Deduction:
• Other elements that can alter their electron structures to become like those of noble gases
• They would become less reactive by doing so.
Key Terms
ion ion name formula unit
cation octet rule variable charge metal
anion ionic bond polyatomic ion
ion symbol ionic compound
Problem Checklist
1.1. Write the ion symbol and ion name given the number of protons and electrons, and vice versa.
1.2. Use the octet rule to predict the ions formed by the representative elements (Group A
elements).
1.3. Describe the formation of an ionic bond and an ionic compound.
1.4. Predict the formula for an ionic compound given the two elements involved.
1.5. Write the name of a simple ionic compound given the formula, or the formula give the name.
1.6. Know which elements are variable charge metals and write their ion names.
1.7. Write the name or formula for an ionic compound that contains a variable charge metal.
1.8. Given an “ate” polyatomic ion, write the “ite” form and the “bi” form.
1.9. Write the name or formula for an ionic compound that contains a polyatomic ion.
Textbook Practice Problems
Textbook Section Page # Questions
6.1 Ions: Transfer of Electrons p.178 6.1, 6.3, 6.5, 6.7, 6.9, 6.11, 6.13
Understanding the Concepts p.214 6.97, 6.99
Additional Practice Problems p.215 6.113, 6.151
6.2 Ionic Compounds p.182 6.15, 6.17, 6.19
Understanding the Concepts p.215 6.101(not f&g)
Additional Practice Problems p.215 6.115, 6.153(not c)
6.3 Naming and Writing Ionic Formulas p.185 6.21, 6.23, 6.25, 6.27, 6.29, 6.31, 6.33
Understanding the Concepts p.215 6.103
Additional Practice Problems p.216 6.119
6.4 Polyatomic Ions p.190 6.35, 6.37, 6.39, 6.41, 6.43, 6.45(not a)
Additional Practice Problems p.216 6.117
Chapter 6 Answers p.218
, Unit 4 Ions and Ionic Compounds
Contents
6.1 Ions: Transfer of Electrons ....................................................................................................................... 3
Stable Electron Configurations .................................................................................................................. 3
6.2 Ionic Compounds .................................................................................................................................... 6
Chemical Formulas of Ionic Compounds................................................................................................... 7
6.3 Naming and Writing Ionic Formulas........................................................................................................ 8
Metals with Variable Charge ..................................................................................................................... 9
Determination of Variable Charge .......................................................................................................... 10
Ion Charges, Periodic Table ..................................................................................................................... 11
Naming Ionic Compounds with Variable Charge Metal Ions .................................................................. 11
Writing Formulas from the Name of an Ionic Compound ...................................................................... 12
6.4 Polyatomic Ions ..................................................................................................................................... 12
Naming of Polyatomic Ions ..................................................................................................................... 13
Writing Formulas Containing Polyatomic Ions ........................................................................................ 14
Naming Ionic Compounds Containing Polyatomic Ions .......................................................................... 15
, 6.1 Ions: Transfer of Electrons
Stable Electron Configurations
Fact:
• Noble gases, such as helium, neon, and argon are
inert,
• They undergo few if any chemical reactions.
Theory:
• The inertness of noble gases results from their
electron structures.
• each (except helium) has an octet of electrons in
its outermost shell.
Deduction:
• Other elements that can alter their electron structures to become like those of noble gases
• They would become less reactive by doing so.
