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Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
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answer, put a line through the box and then mark your new answer with a cross .
1 The elements in group 7 of the periodic table are called the halogens.
(a) Give the symbol of the element astatine.
Use the periodic table to help you.
(1)
........................................ . . . . . . . . . . . . . . . . . . . . . .
(b) (i) What is the colour of chlorine gas at room temperature?
(1)
A yellow-green
B red-brown
C purple
D black
(ii) Damp blue litmus paper can be used to test for chlorine gas.
Use words from the box to complete the sentences.
(2)
blue orange red white yellow
When damp blue litmus paper is added to chlorine gas there are two colour changes.
The damp blue litmus paper changes from blue to ............................................................................. .
The colour of the litmus paper then changes to ............................................................................. .
2
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(c) Figure 1 shows the atomic number and boiling point of some of the halogens.
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halogen atomic number boiling point in °C
fluorine 9 –188
chlorine 17 –35
bromine 35 59
iodine 53
Figure 1
(i) Describe the trend in the boiling points of the first three halogens in Figure 1.
(2)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
(ii) Using the information in Figure 1, predict the boiling point of iodine.
Write your prediction on the answer line below.
(1)
boiling point of iodine = ................................................ . . . . . . . . . . . . . . °C
(Total for Question 1 = 7 marks)
3
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Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 The elements in group 7 of the periodic table are called the halogens.
(a) Give the symbol of the element astatine.
Use the periodic table to help you.
(1)
........................................ . . . . . . . . . . . . . . . . . . . . . .
(b) (i) What is the colour of chlorine gas at room temperature?
(1)
A yellow-green
B red-brown
C purple
D black
(ii) Damp blue litmus paper can be used to test for chlorine gas.
Use words from the box to complete the sentences.
(2)
blue orange red white yellow
When damp blue litmus paper is added to chlorine gas there are two colour changes.
The damp blue litmus paper changes from blue to ............................................................................. .
The colour of the litmus paper then changes to ............................................................................. .
2
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(c) Figure 1 shows the atomic number and boiling point of some of the halogens.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
halogen atomic number boiling point in °C
fluorine 9 –188
chlorine 17 –35
bromine 35 59
iodine 53
Figure 1
(i) Describe the trend in the boiling points of the first three halogens in Figure 1.
(2)
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ ................ . . . . . . . . . . . . . . . . . . . .
(ii) Using the information in Figure 1, predict the boiling point of iodine.
Write your prediction on the answer line below.
(1)
boiling point of iodine = ................................................ . . . . . . . . . . . . . . °C
(Total for Question 1 = 7 marks)
3
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