Exam-style Questions: Chemical Bonding

 

  1. The diagram below shows the electron arrangements of magnesium and oxygen:

    Exam-style Questions

    a) Draw a diagram showing how a bond is made between magnesium and oxygen.

    (2 marks)

    b) What name is given to this type of chemical bond?

    (1 mark)

    (Marks available: 3)

    Answer

     

    Answer outline and marking scheme for question: 1

    a)

    Exam-style Questions

    (2 electrons moving = 1 mark)

    (complete transfer = 1 mark)

    b)Ionic

    (1 mark)

    (Total = 3 marks)

  2. a) What type of chemical bond would you expect in hydrogen fluoride, HF?

    (1 mark)

    b) Draw a diagram to show how this bond is formed.

    (2 marks)

    (Marks available: 3)

    Answer

     

    Answer outline and marking scheme for question: 2

    a) Covalent

    (1 mark)

    b)

    Exam-style Questions

    (1 mark = 1 shared pair electrons)

    (1 mark = 1 electron from each atom)

    (Total = 3 marks)

  3. Look at the diagram below:

    Exam-style Questions

    a) Which type of structure is shown in the diagram?

    (1 mark)

    b) Will a material with this structure be able to conduct electricity?

    Explain your answer.

    (2 marks)

    (Marks available: 3)

    Answer

     

    Answer outline and marking scheme for question: 3

    a) Metallic.

    (1 mark)

    b) The material will be able to conduct electricity,

    (1 mark)

    because there are free electrons that are able to move through the structure.

    (1 mark)

    (Total = 3 marks)

  4. Look at the table below:

    Substance: Melting point (°C):
    A 445
    B 1907
    C -7

    a) Which substance, A,B or C could have a metallic structure?

    (1 mark)

    b) Which substance, A, B or C could have a simple covalent structure?

    (1 mark)

    (Marks available: 2)

    Answer

     

    Answer outline and marking scheme for question: 4

    a) B (highest melting point)

    (1 mark)

    b) C (lowest melting point)

    (1 mark)

    (Total = 2 marks)