Chemical Bonds and Energy

  1. Handout: Chemical Bonds Notes
  2. Types of Bonds
    1. Strong Bonds - Covalent and Ionic
      1. Handout: Electronegativty Tables
      2. Molecular Substances
        1. Handout: eChem guide sheet
      3. Ionic Substances
      4. Homework: Types of Substances Sheet
    2. Weak Bonds (van der Waals attractions)
      1. Demo: Viscosity
      2. See the molecules in the viscosity demo.
      3. Some properties that are affected by van der Walls forces
        1. Melting point
        2. Boiling point
        3. Evaporation rate
      4. Homework: 1) Pick one of the properties above and explain how intermolecular forces play a role in creating these characteristics of materials. Choose a substance and speculate on which kind of Van der Waals attractions may be involved and describe how these weak bonds are formed. 2) Explain the differences between covalent bonds, ionic bonds, and van der Waals bonds.
  3. Chemical Formulas and Equations
    1. Elements
      1. The names of the elements are given on the periodic table.
      2. Formulas are written differently depending on the element.
        1. The formula for most elements is just its symbol. For example, Na for sodium or Xe for xenon.
        2. Some elements naturally come in diatomic molecules. When expressing this element in its pure form we would write a formula indicating this state. There are seven diatomic elements: H2, N2, O2, F2, Cl2, Br2, and I2. You should memorize these.
    2. Compounds
      1. Ionic Compounds
      2. Handout: Solubility Rules and Common Ions
      3. Homework: Binary Ionic Naming Sheet
      4. Homework: Binary Ionic With Roman Numerals.
      5. Homework: Polyatomic Ion Sheet.
      6. Molecular Compounds
      7. Ban dihydrogen monoxide! DMHO Fact Sheet- Join the movement by clicking here.
      8. Acids
      9. Homework: Naming Various Chemicals Sheet
      10. Get some extra practice on naming substances at the ChemTeam website.
    3. General naming and formula writing strategy
    4. Writing Chemical Equations
      1. Demo: Precipitation of NaCl and Pb(NO3)2
      2. Lab: Predicting Precipitates
      3. Homework: Seven Solution Practice
    5. Balancing Equations
      1. Homework: Balance Practice
      2. If you want even more practice on balance equations click here to see the ChemTeam's set of problems.
      3. Lab: Seven Solution Lab
    6. Types of Reactions
      1. Homework: Types of Reactions
      2. Lab: Common Chemical Reactions
      3. Lab: Copper Conversion Lab
  4. Chemical Potential Energy
    1. Demo: Various Types of Potential Energy
    2. Types of Potential Energy
      1. Handout: Energy Storage in Your Body
      2. Homework: Chemicl Potential Energy in Chemical Reactions
      3. Homework: Draw potential energy curves for the following situations - an exothermic reaction that is likely to be completely spontaneous, a reaction which would require a constant input of energy to complete, an exothermic reaction with a high activation energy, an endothermic reaction with a low activation energy, a reaction in which the reactants and products contain approximately but not exactly the same chemical potential energy.
    3. Phase Change and Chemical Potential Energy
      1. Lab: Sodium Thiosulfate Lab
      2. Lab: Ice to Steam Lab
      3. Homework: Chemical Potential Energy and Phase Changes
      4. Homework: Lab Questions
    4. Activation Energy
    5. Catalysts
      1. Homework: Activiation Energy
  5. Handout: Chemical Bonding Review