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  1. The outline below is of part of the periodic table. The letters shown represent some of the elements but they are not the symbols of those elements.

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    a) Which letters shown on the diagram are:

    (i) Two elements in the same group?

    (1 mark)

    (ii) Two elements in the same period?

    (1 mark)

    (iii) Two elements that are metals?

    (1 mark)

    (iv) An unreactive gas?

    (1 mark)

    (Marks available: 4)

    Answer

     

    Answer outline and marking scheme for question: 1

    a)

    (i) C and D.

    (1 mark)

    (ii) A and C.

    (1 mark)

    (iii) A and B.

    (1 mark)

    (iv) E.

    (1 mark)

    (Total = 4 marks)

  2. Sodium oxide forms an alkaline solution when it dissolves in water, sulphur dioxide forms an acidic solution.

    a) What type of elements usually have alkaline oxides?

    (1 mark)

    b) What type of element usually forms acidic oxides?

    (1 mark)

    (Marks available: 2)

    Answer

     

    Answer outline and marking scheme for question: 2

    a) Metals.

    (1 mark)

    b) Non-metals

    (1 mark)

    (Total = 2 marks)

  3. Elements of the periodic table that have similar properties are organised in to groups.

    The following questions are about Group VII.

    a) What name do we give to the Group VII elements?

    (1 mark)

    b) How many electrons do the members of Group VII have in their outer shell?

    (1 mark)

    c) What happens to the reactivity of the halogens as you go down Group VII?

    Explain your answer.

    (2 marks)

    (Marks available: 4)

    Answer

     

    Answer outline and marking scheme for question: 3

    a) Halogens.

    (1 mark)

    b) 7.

    (1 mark)

    c) It decreases,

    (1 mark)

    because the atoms of the halogens are getting larger as you go down the group so they are do not gain electrons as readily.

    (1 mark)

    (Total = 4 marks)

    (Nucleus of elements lower down does not attract electrons as much as the higher elements as the positive charge is shielded by the inner electrons).

  4. Transition metals are found in the centre section of the periodic table.

    a) Give two ways that transition metals are different to Group I metals?

    (2 marks)

    b) Give one way that transition metal compounds are different to Group I metal compounds.

    (1 mark)

    (Marks available: 3)

    Answer

     

    Answer outline and marking scheme for question: 4

    a) Any two from:

    • Transition metals are denser than water.
    • Transition metals have much higher melting/boiling points.
    • Transition metals do not react as vigorously.
    • Transition metals can be used as catalysts.

     

    Or opposite statement referring to Group I metals.

     

    (1 mark each, maximum 2 marks)

    b) Either answer = one mark:

    • Transition metal compounds can be coloured, (Group I metals are white/colourless in solution).
    • Transition metals can form compounds with more than one formula.

     

    Or opposite statement referring to Group I metals.

    (1 mark)

    (Total = 3 marks)