The diagram shows part of the Periodic Table. Only some of the elements are shown. H Na Mg K Ca Rb C N O Al Si P Fe Cu Zn

1. (a)Answer each of the following questions using only those elements shown in the diagram. Each element may be used once, more than once or not at all. Give one element which
2. (a)(i)has a giant molecular structure,[1]
3. (a)(ii)combines with oxygen to form a gas which contributes to acid rain,[1]
4. (a)(iii)forms an ion of type X+ which has only three completely filled shells of electrons,[1]
5. (a)(iv)has an atom with only seven protons in its nucleus,[1]
6. (a)(v)has an atom with only six electrons,[1]
7. (a)(vi)has a chloride of type XCl2, whose aqueous solution forms a white precipitate on addition of sodium hydroxide.[1]
8. (b)Under reduced pressure, potassium reacts with oxygen to form potassium oxide, K2O. Construct the equation for this reaction.[1]
9. (c)Aluminium is higher than zinc in the reactivity series. Explain why aluminium foil does not react with an aqueous solution of zinc ions.[2]

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