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Here are some useful worksheets that I have found around the web. Please let me know if you find any broken links!

A nice periodic table with common ions: monatomic and polyatomic.

Chapter 1 (Measurement and the Properties of Matter)

• Unit conversions
• More unit conversions
• Significant figures
• Significant figures & calculations

Chapter 2 (Atoms, Ions, and Molecules)

• Protons, neutrons, and electrons
• Naming compounds (summary)
• Formulas <-> names
• Formulas <-> names, part 2
• Formulas <-> names, part 3
• Naming ionic compounds
• Naming ionic compounds, part 2
• Writing formulas for ionic compounds
• Writing ionic formulas and naming ionic/covalent compounds worksheet and answers

Chapter 3 (Mass Relationships in Chemical Reactions)

• Finding molar mass
• Mole/mass/number conversions
• More mole/mass/number conversions
• Percent composition
• Balancing chemical equations
• The mole highway
• Mole/mass relationships in chemical equations
• Limiting reagents
• Limiting reagents and % yield worksheet and answers
• Percent yield calculations
• Stoichiometry
• Stoichiometry, part 2
• Stoichiometry, part 3

Chapter 4 (Reactions in Aqueous Solutions)

• Solution concentration
• Making solutions
• Molarity
• Titrations
• Molecular, Full, and Net-ionic equations

Chapter 5 (Gases)

• Gas laws
• Gas stoichiometry
• Gas mixtures worksheet and answers
• Gas laws worksheet and answers

Chapter 6 (Thermochemistry)

• Calorimetry worksheet
• Calorimetry exercises and answers
• Thermochemistry practice multiple choice questions and answers

Chapter 7 (Quantum Theory and the Electronic Structure of Atoms)

• Practice worksheet about EM radiation and answers
• Electron energy levels worksheet and answers
• Hydrogen atom worksheet and answers
• Electron configurations and orbital diagrams worksheet and answers
• Quantum and hydrogen atom worksheet and answers

Chapter 8 (Periodic Relationships Among the Elements)

• Writing electron configurations
• Periodic properties and trends worksheet and answers

Chapter 9 (Compounds and Bonding)

• Lewis structures practice questions and answers
• More practice Lewis structures and answers (1, 2, 3, and 4)

Chapter 10 (Structure and Bonding Theories)

• VSEPR worksheet
• Lewis structures, shapes, and polarity worksheet
• Polar bonds worksheet and answers
• VSEPR and polarity worksheet and answers

Resources from other schools

General Chemistry 1
A good set of notes, worksheets, and video links:
https://blogs.nvcc.edu/alchm/lecture/chm111/