WCR W3

1. How well do we know the Periodic Table?

1.1  Relate an atom’s electron configuration to its Periodic Table row and group.

1.1B   *Extension: Investigate the s, p, d and f blocks of the Periodic Table.

1.2  Describe trends in reactivity and metallic character across a row and down a group on the Periodic Table, and so predict those properties for a given element.

1.3  Define ‘isotope’ and ‘radioisotope’ and give examples.

1.4  Explain that natural radioactivity arises from the decay of nuclei in atoms, releasing particles and energy.

1.5  Identify examples of the medical and industrial use of nuclear energy.

1.5b   *Extension: Assess examples of the medical and industrial uses of nuclear energy.

2. How do we know one compound from another?

2.1  Draw models to represent an atom, ion and isotope.

2.2  Construct formulas for a range of ionic compounds, including those containing common polyatomic ions.

2.3  Name ionic compounds from their formulas using -ide, -ite and -ate endings.

2.4  Define salt as a compound forming between a positive metal ion and a negative ion (non-metal or polyatomic).

3. How fast are chemical reactions?

3.4  Identify the energy changes in a chemical reaction as (energy producing) or endothermic (energy requiring.)

3.1  Define reaction rate as change in concentration with time.

3.2  Use collision theory to explain how and why reaction rate is affected by temperature, surface area, concentration and the presence of a catalyst.

3.3  Design, conduct and analyse valid, reliable and accurate scientific investigations of the factors that affect reaction rate.

4. How do we represent substances reacting?

4.1  Describe the components of a chemical equation, including reactants, products and the meaning of the arrow.

4.2  Use the Law of Conservation of Mass - that atoms are rearranged in chemical reactions, not created nor destroyed – to explain the need to balance a chemical equation.

4.3  Insert coefficients to balance a given chemical symbol equation.

4.3B   *Extension: Write balanced chemical equations from word equations and experimental observations.

5. What are decomposition reactions?

5.1  Carry out decomposition reactions and write word equations

5.1B   *Extension: Write symbol equations

6. When do precipitation reactions occur?

6.1  For soluble, insoluble, aqueous, solution, precipitate:

a.     define the terms

b.    draw and interpret diagrams to explain them.

6.2  Conduct experiments and write word equations for precipitation reactions.

6.3  Given solubility rules, predict whether or not a precipitate will form in a reaction between ionic solutions.

6.3b   *Extension: Describe what soluble and insoluble substances look like when placed in water, and explain in terms of the actions of their ions.

7. (Revision - if time) What happens when substances react with oxygen?

7.1  Outline the nature of corrosion and evaluate its impact in our world.

7.2  Outline the nature of combustion and evaluate its impact in our world.

7.3  Compare combustion and cellular respiration reactions in terms of reactants, products, energy produced and rate of reaction.

8. (Revision - if time) How do acids and bases affect our world?

8.1  Use the properties of acids and bases to identify given unknown substances:

a.       experimentally

b.       from provided data.

8.2  Give examples of acids acting in our world, including digestion in the stomach.

8.3  Write the chemical formula for hydrochloric, sulfuric and nitric acids.

8.4  Give examples of bases acting in our world, including antacids.

8.5  Write the chemical formula for sodium and potassium hydroxides.

8.6  Identify reactants, predict products and write word equations for acid + metal reactions.

8.7  Identify reactants, predict products and write word equations for acid + carbonate reactions.

8.8  Identify reactants, predict products and write word equations for acid + base reactions.

8.9  Give examples of neutralisation reactions in our world, and explain how they affect the pH of the solutions involved.