1) Define an element. How many are there in the Periodic Table?
2) Write a table with the charges and masses of protons, neutrons and electrons.
3) Define atomic number and mass number.
4) Draw electron (energy level) diagrams for Be, S, Al, Cl and K. Also, write down the number of protons and neutrons for each. Finally, write the symbols (with mass no. and atomic no.)
5) Why have all Group 7 elements (halogens) got similar chemical properties?
6) Draw how ionic bonding occurs in LiCl, MgO and Mg Cl2.
7) Draw how covalent bonding occurs in CH4, F2 and H20 (H-O-H).
8) Balance this equation: C3H8 + O2 ---------> CO2 + H2O. Then, work out the masses each side to prove they are the same. (C = 12; H = 1; O = 16).
9) Write the name and formula of the chemical compound that forms limestone.
10) What is the name of the process by which carbonates are broken down by heating?
11) Draw a flow diagram of the limestone cycle, including chemical names and formulae.
12) Complete the general reaction: Acid + Carbonate --------> S…… + W…….. + C……… …………
13) Explain how limestone is used to make cement, mortar and concrete.
14) What is the test for CO2 gas?
15) What is the definition of an ore? Why might the economics of extraction change over time?
16) Draw a blast furnace and explain how iron is extracted from iron ore.
17) Why is the extraction of aluminium and titanium metals expensive? (Two reasons please)
18) Explain the technique by which copper can be purified. What is a use of pure copper?
19) Explain the processes of phytomining and bioleaching.
20) Why is recycling beneficial to the environment?
21) What % of iron comes from the blast furnace? What effect does this have on its properties?
22) Give some properties of low-carbon, high-carbon and stainless steels.
23) Why might an alloy of aluminium be preferable to the pure metal in aeroplane manufacture?
24) What name is given to the metals in