The document describes reactions of metals with oxygen. It defines oxidation as the addition of oxygen to an element and the loss of electrons, and reduction as the removal of oxygen from an element and the gain of electrons. Word and symbol equations are provided for reactions of various metals like iron and magnesium with oxygen, where the metal gains oxygen and is oxidized to form metal oxides. Examples of oxidation and reduction reactions are discussed along with related concepts like electrons lost or gained in the processes.

1. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Do Now (5 min):
1. The law of conservation of mass states that… (1)
2. Explain why, if a gas is produced in a reaction, it might appear
like there has been a loss of mass. (2)
3. Name the type of bonding in each of the diagrams below: (3)
a. b. c.
4. 26g of magnesium react with oxygen in the air to produce 47g
of magnesium oxide. Calculate the mass of oxygen involved in
the reaction. (2)
5. Convert 132.5kJ into joules. (1)
Challenge: Describe a method of collecting a gas.

2. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Do Now Answers (5 min):
1. Matter cannot be either created or destroyed.
2. The gas may escape into the air/surroundings ; its
mass will therefore not be recorded by a balance.
3. Name the type of bonding in each of the diagrams
below: (3)
a. Metallic b. Covalent c. Ionic
4. 47-26 = 21g (one mark for units in final answer) (2)
5. 132.5 kJ x 1000 = 132500 J (1)
Challenge: One method of collecting a gas in a reaction would be
to place a balloon over the mouth of the test tube. This would trap
the gas, preventing it from moving out into the air/surroundings.

3. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
40%
• Define oxidation.
50%
• Define reduction.
60%
• Write word (and symbol)
equations for the reactions
of metals with oxygen.

5. added
or
removed

6. magnesium + oxygen  magnesium oxide
oxidation

7. copper oxide + carbon  copper + carbon dioxide
reduction

8. Reduction occurs when…
A. Iron rusts in presence of oxygen
B. Oxygen is removed from a
compound
C.Oxygen is added to an element

9. Reduction occurs when…
A. Iron rusts in presence of oxygen
B. Oxygen is removed from a
compound
C.Oxygen is added to an element

10. Reduction results in…
A. The loss of electrons
B. Gain of electrons
C.Loss of a proton

11. Reduction results in…
A. The loss of electrons
B. Gain of electrons
C.Loss of a proton

12. Oxidation results in…
A. The loss of electrons
B. Gain of an electron
C.Loss of a proton

13. Oxidation results in…
A. The loss of electrons
B. Gain of an electron
C.Loss of a proton

14. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Define oxidation. The addition of oxygen to an
element and the loss of
electrons.
Define reduction. The removal of oxygen from an
element and the gain of
electrons.
metal + oxygen  metal oxide
In this reaction:
metal + oxygen  metal oxide
The metal has been oxidised.
In this reaction:
copper oxide + carbon  copper + carbon
dioxide
2 CuO (s) + C (s) → 2 Cu (s) + CO2 (g)
The copper has been reduced &
the carbon has been oxidised.
Look, cover, write, check

15. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Define reduction. The addition of oxygen to an
element and the loss of
electrons.
Define oxidation. The removal of oxygen from an
element and the gain of
electrons.
metal + oxygen  metal oxide
In this reaction:
metal + oxygen  metal oxide
The metal has been oxidised.
In this reaction:
copper oxide + carbon  copper + carbon
dioxide
2 CuO (s) + C (s) → 2 Cu (s) + CO2 (g)
The copper has been reduced &
the carbon has been oxidised.
Spend 2 minutes quizzing
the person next to you.
If their answer is perfect, let
them ask you a question, if
not, correct them and ask
them to repeat the answer.

16. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Recall Quiz: (5 mins)
1. Oxidation describes the process of an element
(gaining/losing) oxygen, while reduction occurs when…
2. What is name of the product formed when a metal reacts with
oxygen?
3. The word equation for the oxidation of magnesium is:
magnesium + _____  _____ ____
4. If a reaction produces pure iron from iron oxide, we can say
that the element has been…

17. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Recall Quiz Answers: (5 mins)
1. Oxidation describes the process of an element gaining
oxygen, while reduction occurs when an element loses
oxygen.
2. When a metal reacts with oxygen, it undergoes oxidation to
produce a metal oxide
3. magnesium + oxygen  magnesium oxide
4. If a reaction produces pure iron from iron oxide, we can say
that the element has been reduced.

18. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – I Do, We Do
Write the word equation for each metal reacting with oxygen.
iron magnesium

19. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – I Do, We Do
Write the word equation for each metal reacting with oxygen.
iron magnesium
iron + oxygen  iron oxide

20. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – I Do, We Do
Write the word equation for each metal reacting with oxygen.
iron magnesium
iron + oxygen  iron oxide magnesium + oxygen 
magnesium oxide

21. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – You Do
Write down word equations for the reactions of each of the metals
below with oxygen. Challenge: Write the symbol equations for Q1,3,4.
1. potassium
2. lead
3. sodium
4. calcium
5. silver
6. gold

22. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – You Do Answers
Write down word equations for the reactions of each of the metals
below with oxygen.
1. potassium + oxygen  potassium oxide
2. lead + oxygen  lead oxide
3. sodium + oxygen  sodium oxide
4. calcium + oxygen  calcium oxide
5. silver + oxygen  silver oxide
6. gold + oxygen  gold oxide

23. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – You Do Answers
1. 4K + O2  2K2O
3. 4Na + O2  2Na2O
4. 2Ca + O2  2CaO

24. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Exit ticket:
1. Write the name of the element which is oxidised in the
following reactions: (2)
a. beryllium + oxygen  beryllium oxide
b. lithium + oxygen  lithium oxide
2. Write the word and symbol equation for the oxidation of iron
(III). (2)
3. What is the name for the removal of an electron from an
element? (1)

25. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Exit ticket:
1. Write the name of the element which is oxidised in the
following reactions: (2)
a. beryllium + oxygen  beryllium oxide
b. lithium + oxygen  lithium oxide
2. Write the word and symbol equation for the oxidation iron (III).
Iron + oxygen  iron oxide
4 Fe + 3 O2  2 Fe2O3
3. What is the name for the removal of an electron from an
element?
Oxidation