Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
The Halogens
86 practice questions
Topics covered
Practice questions
61–70 of 86
Question 61
3 marks · Easy
Answer and see the solution →Below is a table of some Group 7 elements and their melting points.
Melting points of some halogens Element Melting Point (°C) Fluorine -220 Chlorine -101 Bromine -7 Iodine 114 (a)[1 mark]Describe the trend in melting point as you go down Group 7.
(b)[2 marks]Predict whether astatine would have a higher or lower melting point than iodine. Give a reason for your answer.
Question 62
1 mark · Easy
Answer and see the solution →State how many electron shells are completely full in a chlorine atom.
Question 63
3 marks · Easy
Answer and see the solution →This question is about the properties of the halogens.
(a)[1 mark]What is the formula of the ion formed when iodine forms an ionic salt?
(b)[2 marks]Describe the colour and state of iodine at room temperature.
Question 64
2 marks · Easy
Answer and see the solution →The table below gives the melting points of chlorine and bromine (both Group 7 elements):
Element Melting point (°C) Chlorine -101 Bromine -7 Iodine is the next element down the group after bromine. Use the data to estimate a likely melting point for iodine and explain your reasoning based on group trends.
Question 65
2 marks · Easy
Answer and see the solution →A chlorine atom can react to form a chloride ion. Calculate the total number of electrons in this chloride ion. Explain your answer using the electronic configuration.
Question 66
2 marks · Normal
Answer and see the solution →State two trends that occur when you go down Group 7 (the halogens) in the Periodic Table.
Question 67
4 marks · Normal
Answer and see the solution →This question is about electrons and halogen reactivity.
(a)[1 mark]State the charge on the ion formed when a chlorine atom gains an electron.
(b)[3 marks]Explain, in terms of electron arrangement, why chlorine is more reactive than bromine.
Question 68
3 marks · Normal
Answer and see the solution →Explain why astatine is less reactive than bromine, in terms of atomic structure and electronic configuration.
Question 69
4 marks · Normal
Answer and see the solution →The table shows some properties of Group 7 elements.
Element Colour at room temperature State at room temperature Melting point (°C) Chlorine Green Gas -101 Bromine Red-brown Liquid -7 Iodine Dark grey Solid 114 (a)[2 marks]Predict the appearance and physical state of astatine at room temperature.
(b)[2 marks]Suggest a melting point for astatine, based on the trend in the table.
Question 70
1 mark · Normal
Answer and check →Which statement best explains why chlorine is more reactive than bromine?
- A.Chlorine has a higher nuclear charge than bromine.
- B.Chlorine has a smaller atomic radius, so its outer electrons are more strongly attracted to the nucleus.
- C.Chlorine forms positive ions more easily than bromine.
- D.Chlorine has more energy levels than bromine.