Exam-style Questions: Chemical Bonding
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The diagram below shows the electron arrangements of magnesium and oxygen:
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 outline and marking scheme for question: 1
a)
(2 electrons moving = 1 mark)
(complete transfer = 1 mark)
b)Ionic
(1 mark)
(Total = 3 marks)
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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 outline and marking scheme for question: 2
a) Covalent
(1 mark)
b)
(1 mark = 1 shared pair electrons)
(1 mark = 1 electron from each atom)
(Total = 3 marks)
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Look at the diagram below:
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 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)
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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 outline and marking scheme for question: 4
a) B (highest melting point)
(1 mark)
b) C (lowest melting point)
(1 mark)
(Total = 2 marks)