The diagram shows part of the Periodic Table. Mg V Fe B C Al Si P Cu Zn Answer the questions using only the elements shown in the diagram. Each element may be used once, more than once or not at all. Write the symbol for an element which:

1. (a)forms a stable ion by gaining three electrons[1]
2. (b)is extracted from haematite[1]
3. (c)forms an ion which gives a red-brown precipitate on addition of aqueous ammonia[1]
4. (d)has chemical properties similar to those of calcium[1]
5. (e)can have lubricating properties.[1]

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