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Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section

Electronic configurations and the periodic table

19 practice questions

Start practising (8 questions)

Practice questions

1–8 of 8 · Normal

  1. Question 1

    2 marks · Normal

    State the number of electron shells and the number of electrons in the outer shell for an atom of phosphorus (atomic number 15).

    Answer and see the solution →

  2. Question 2

    4 marks · Normal

    (a)

    Complete the electronic configuration for calcium (atomic number 20).

    [1 mark]
    (b)

    State the group and period of calcium in the Periodic Table.

    [1 mark]
    (c)

    Explain what the group and period numbers tell you about calcium’s electron arrangement.

    [2 marks]
    Answer and see the solution →

  3. Question 3

    3 marks · Normal

    Argon is a noble gas with atomic number 18. Calculate the number of electrons in its outer shell and state which group and period it belongs to.

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  4. Question 4

    3 marks · Normal

    Barium is in Group 2 and Period 6 of the Periodic Table. Explain how you can tell, from its position, the number of electrons in its outer shell and the number of electron shells it has.

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  5. Question 5

    4 marks · Normal

    The table shows the electronic configurations and Periodic Table positions for four elements.

    Electronic configurations and positions for four elements
    ElementElectronic configurationGroupPeriod
    A2,8,4
    B2,8,8,1
    C2,7
    D2,8,5
    (a)

    Complete the table by entering the group and period for each element.

    [2 marks]
    (b)

    Which element is in the same group as carbon? Give a reason for your answer.

    [2 marks]
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  6. Question 6

    1 mark · Normal

    Which of the following elements is in period 2 and group 7 of the Periodic Table?

    1. A.Fluorine (2,7)
    2. B.Chlorine (2,8,7)
    3. C.Nitrogen (2,5)
    4. D.Neon (2,8)
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  7. Question 7

    2 marks · Normal

    State the group and period of silicon (atomic number 14) and explain your reasoning.

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  8. Question 8

    4 marks · Normal

    (a)

    Draw or describe the electronic configuration for sodium (Na, atomic number 11).

    [1 mark]
    (b)

    Identify its group and period in the Periodic Table.

    [1 mark]
    (c)

    Explain how sodium’s position in the Periodic Table is related to its electronic configuration.

    [2 marks]
    Answer and see the solution →