1. Chemical Reactions revision
LO: to revise elements and chemical reactions
Use your periodic table to find
3 elements beginning with H
The elements which have the symbols
Au, Pb, Be, O, Na, Li, Ca
2 elements which bond together to make something you put on your food
Elements song with lyrics

2. By the end of this lesson you should be able to answer these questions
Name 3 elements and 3 compounds
Write down 3 signs that tell you a chemical reaction has occurred
Name 3 acids
How do we test for hydrogen gas?
How do we test for carbon dioxide gas?
What is the formula for Magnesium carbonate?

3. Atoms, elements, molecules and compounds
All matter is made from atoms (particles) All atoms are composed of protons, neutrons and electrons Different atoms have different number of protons Molecules are a group of 2 or more atoms bonded together. Compound is 2 or more different atoms bonded together

4. Exam question

5. What is your prediction?
Reaction of Magnesium and hydrochloric acid
What is your prediction?

6. 1. Wear goggles METHOD: Reacting metals with acids
2. Pour 1cm of HCl into a boiling tube,
3. Add a few pieces of Magnesium
4. Collect the gas in another boiling tube
5. Light a split and place it inside the test tube above the acid
Answer in full sentences in your book
1.How do you know a reaction is occurring?
2. How do you test for hydrogen gas?
3. Write a word equation for this reaction

7. Acids and metals Remember that acids are corrosive.
Many metals react with acids. When this happens the metal fizzes as bubbles are produced.
What do the bubbles mean?
Hydrogen gas is produced.
How do we test for hydrogen?
Use a burning splint to make the hydrogen explode.
burning splint
hydrogen
Mg + acid

8. Reactions of metal with acids equation
salt
hydrogen
Metal carbonate
acid
salt
water
Carbon dioxide gas

9. The Rules Hydrochloric Acid → Chloride Sulphuric Acid → Sulphate
Remember
Hydrochloric Acid → Chloride
Sulphuric Acid → Sulphate
Nitric Acid → Nitrate

10. Naming compounds

11. Exam question

12. 1. Use the periodic table to match the symbol/name to the elements
TASK: Revision questions, discuss with your partner and then answer in your book (in full sentences)
1. Use the periodic table to match the symbol/name to the elements
Element name Symbol
Gold Si Ag
lead C
2. Name 3 elements and 3 compounds
3. Write down 3 chemical symbols of 3 elements of your choice?
4. Write down 3 signs that tell you a chemical reaction has occurred?
5. Name 3 acids
6. How do we test for hydrogen gas?
7. How do we test for carbon dioxide gas?
8. What is the formula for Magnesium carbonate?

13. TASK: Use the periodic table to find the symbols for these elements and answer these question
Example: a Board game: carbon, helium, two sulphurs
C He S S
1. Relative: sulphur, oxygen, nitrogen
2. Fuel: carbon, oxygen, aluminium
3. Group of fish: sulphur, hydrogen, oxygen, aluminium
4. For the rubbish: boron, iodine, nitrogen
5. A toy story: Tungsten, oxygen, oxygen, dysprosium
My favourite: Sulphur, hydrogen, rhenium, potassium
A disney character: Argon, iodine, aluminium
Where are you. Sulphur, Silicon, Sulphur
Now make up 3 of your own for your partner to try
Remember to write the symbols with capitals and small letters in the correct place eg Helium is He

14. From the video. Meet the elements
Answer these questions
How do we make diamond from coal?
What is glass made from?
What do we use the element Hg for?
What 4 elements make up most living things?
What are stars mostly made from?
What is CaSO4 better known as?