1. YEAR 10 REVIEW Material World – Acids and Materials

2. 1. All matter is made up of atoms. Label the parts of the atom. 1. Nucleus 2. Proton 3. Neutron 4. Electron 5. Shell Hint: the red particles are positive A B C D E E C A D B

3. 2. Fill in the missing symbols and names of the elements. Hydrogen Chlorine HeK LithiumSilicon BerylliumSodium BMg CarbonFluorine NO AluminiumSulfur

4. 3. Work out what type and how many atoms are in a compound by looking at its formula. 4  H 2 O = 2 x H and 1 x O  CO 2  2FeS  C 6 H 12 O 6  3O 2  MgCl 2  Ca(OH) 2 = 1 X C and 2 X O = 3 = 2 X Fe and S X O = 2 = 6 X C and 12 X O and H X 12= 24 = 3 X 2 X O = 6 = 1 X Mg and 2 X Cl = 3 = 1 X Ca and 2 X O and 2 X H = 5

5. 4. Complete the following word equations.  Acid + __________  salt + water  Acid + __________  salt + water + carbon dioxide  Acid + __________  salt + hydrogen gas Hint: use metal, carbonate, and base Metal Carbonate Base

6. 6. Name 3 acids and 3 bases. Acids Lemon juice Bile in stomach Vinegar Bases Clothes washing powder Baking soda Soap

7. 7. Where would you find acids, bases and water on the pH scale? SStrong acids – pH = 0 WWeak acids – pH = 6 WWater – pH = 7 WWeak bases – pH = 8 SStrong bases – pH = 14

8. 8. Match the test with the gas it tests for. 1. Hydrogen 2. Oxygen 3. Carbon dioxide A. Limewater will change from clear to white; a lit splint will go out B. A lit splint blown out will relight C. ‘pop’ test – a flame goes out with a ‘pop’ C B A

9. 9. Give a use and a reason for that use for each metal listed. MetalUseReason Gold Copper Mercury Chromium Aluminium

10. 10. What is needed for complete combustion?  Lots of oxygen

11. 11. What are the products of complete combustion? Incomplete combustion? Hint: What colour forms on the bottom of a beaker if it is held over a yellow flame?