1. How do we write chemical equations?
All pupils will be able to (Baseline): Name compounds given formulae or symbol equations.
Most pupils will be able to (Further): Write word, formulae and balance chemical equations for reactions, using the symbols of the first 20 elements in the periodic table and the elements in Groups 1 and 7.
Some pupils will be able to (Challenge):

2. BINGO!!!! You will need your Periodic Table!
Sketch this table in the backs of your book:
Now write down the name of any 5 of the elements in the periodic table with an atomic number of 1-20.
We will now play Bingo! 1 2 3 4 5 1 2 3 4 5
Beryllium
Boron
Argon
Sulfur
Lithium

3. BINGO: Round 1 The element with the smallest mass number.
Group 1, Period 4
Mass Number 12
Atomic Mass of 14
Group 1, Period 2.
Proton Number 13
Group 7, Period 3
Proton Number 5
Atomic Number 15
Group 6, Period 2
Atomic Mass 4
Atomic Number 20
Atomic Number 10
Group 4, Period 3
Group 2, Period 3
Group 1, Period 3
H, Li, Cl, P, He, Ne, Mg, Na, K, C, N, Al, B, O, Ca, Si

4. What is a chemical reaction?

5. Law of conservation of mass
The total mass of a product formed in a reaction is equal to the total mass of the reactants.
No new atoms are ever created or destroyed

6. Writing balanced symbol equations
Natural gas is used in our homes to provide heat for cooking. Methane (CH4(g)) is the main chemical in natural gas and will react with oxygen (O2(g)) to make carbon dioxide (CO2(g)) and water (H2O(l)).
Write a balanced symbol equation for this reaction.
Which of these are the reactants and which are the products?
CH4(g) + O2(g)  CO2(g) + H2O(l)

7. Writing balanced symbol equations
CH4(g) + O2(g)  CO2(g) + H2O(l) Is this balanced? What do we need to do to balance the equation? 2 2
Balanced

9. Try it yourself (pg. 5) Balance these symbol equations:
KNO3  KNO2 + O2
Li + O2  Li2O
Fe + O2  Fe2O3
Fe2O3 + CO  Fe + CO2

10. Past Exam Question (Higher)

12. Past Exam Question (Foundation)