ASChemistryCambridge (CIE)Exam Questions9. The Periodic Table: Chemical PeriodicityChemical Periodicity of Other Elements

Chemical Periodicity of Other Elements (Cambridge (CIE) AS Chemistry): Exam Questions

Exam code: 9701

37 mins12 questions

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Chemical Periodicity of Other Elements

1a
3 marks

The positions of some elements are shown.

Periodic Table diagram showing the positions of selected elements including Group 1, 2, and 17 elements

Fig. 1.1

i) Using Fig. 1.1 identify the element that forms a soluble hydroxide and an insoluble sulfate.

[1]

ii) Using Fig. 1.1 identify the most volatile element in a group that contains elements in all three states of matter at room temperature and pressure.

[1]

iii) Using Fig. 1.1 identify the element that forms the largest cation.

[1]

How did you do?

1b
5 marks

Fig. 1.2 shows the relative first ionisation energies of six successive elements in the Periodic Table.

The letters are not the symbols of the elements.

Bar graph showing relative first ionisation energies of six successive elements labelled A to F, with element B having a notably lower value than element A

Fig. 1.2

i) Define first ionisation energy.

[2]

ii) Suggest why the first ionisation energy of B is much less than that of A in Fig 1.2.

[3]

How did you do?

1c
4 marks

i) On Fig. 1.3, sketch a graph to show the trend in the atomic radius of successive elements in Period 3.

Blank graph with Period 3 elements Na to Ar on the x-axis and atomic radius on the y-axis, for sketching the trend

Fig. 1.3

[1]

ii) Explain your answer to (c)(i).

[3]

How did you do?

2a
2 marks

Table 2.1 shows successive ionisation energies of an element A, found in Period 3 of the Periodic Table.

Table 2.1

Number of electrons

1

2

3

4

5

6

7

8

Ionisation Energy (kJ mol-1)

1012

1907

2914

4964

6274

21268

25431

29872

Identify element A.

Explain your answer using data from Table 2.1.

How did you do?

2b
5 marks

The graph below in Fig. 2.1 shows some information on the elements of Period 3 of the Periodic Table.

Graph showing first ionisation energy against atomic number for Period 3 elements Na to Ar, with a general increasing trend and lower values at Al and S deviating from the trend

Fig. 2.1

State and explain the trend that this graph shows, including why there are values that deviate from the trend.

How did you do?

2c
1 mark

Explain why the second ionisation energy of aluminium is a larger value than the first ionisation energy.

How did you do?

3a
2 marks

The successive ionisation energies of an element, X, are shown in Fig. 3.1. The vertical axis plots log (ionisation energy) instead of ionisation energy to represent the data without an unreasonably long vertical axis.

Graph of log(ionisation energy) against electron number for element X, showing large increases between the 1st and 2nd, and between the 9th and 10th electrons, indicating three electron shells

Fig. 3.1

Identify element X and give its full electron configuration.

X:

Electronic configuration:

How did you do?

3b
3 marks

Explain how the successive ionisation energy data for element X are related to its electron configuration.

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3c
3 marks

Element Y is in the same period as element X.

Element Y reacts with chlorine to form a chloride that has a pH of 2. When this chloride reacts with water, a rapid reaction occurs, producing white fumes and a white precipitate.

i) Identify element Y

[1]

ii) Construct an equation for the reaction of the chloride formed from element Y with water. Include state symbols in your answer.

[2]

How did you do?