1. What are the chemical symbols for the metals aluminium, iron, titanium, magnesium, zinc, copper, tin, lead, tungsten, silver, uranium and gold in order? A Al, I, Ti, Mg, Zi, Co, Tn, Ld, Tu, Si, U, Go B Al, Fe, Ti, Mg, Zn, Cu, Sn, Pb, W, Ag, U, Au C Al, Fe, T, Mg, Z, Co, Tn, Pb, Tu, Ag, U, Au |
2. Most metals have similar physical properties of: A yellow colour, shiny lustre, very hard B low melting point, good electrical conductivity, silver colour C shiny lustre, good heat and electrical conductivity, and high melting and boiling points |
3. A metal which is an exception because it has a low melting point of –39 degrees Celsius is: A sodium B oxygen C mercury |
4. Two very reactive metals which have densities less than that of water and can therefore float are: A sodium and potassium B lead and copper C aluminium and lead |
5. A metal that is a good electrical conductor and is very ductile (can be pulled into a wire) is: A mercury B calcium C copper |
6. The reason why metals are usually good electrical conductors is because: A their atoms are loosely packed and in no particular arrangement and are able to move freely B metal ions form a lattice surrounded by a "sea" of free electrons C metal atoms form long lines that allow little movement |
7. The mineral from which aluminium is extracted is: A magnesite B galena C bauxite |
8. The mineral from which magnesium is extracted is: A magnesite B haematite C gold |
9. A precious metal used in jewellery and found in a pure form in nature is: Agold Baluminium Ccopper |
10. When a metal reacts with an acid, the products formed are: Asalt and hydrogen Bwater and carbon dioxide Coxygen and metallic oxides |
11. When a metal corrodes in water, they form: Asalt and water Brust and carbon dioxide Cmetal hydroxide and hydrogen |
12. The activity series of metals lists metals from: Amost abundant to least abundant in the earth's crust Bmost reactive to least reactive Cleast used to most used in man-made products |
13. The general name given to a mixture of metals or metals and non-metals such as carbon and silicon is: Asacrificial protection Bmetal carat Can alloy |
14. The refining of a pure metal in a blast furnace is called: Aslag Bsmelting Cfroth flotation |
15. An example of a metal that is extracted by electrolysis is: Aaluminium Biron Ccopper |