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

Electronic configurations and the periodic table

19 practice questions

Start practising (19 questions)

Practice questions

11–19 of 19

  1. Question 11

    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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  2. Question 12

    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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  3. Question 13

    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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  4. Question 14

    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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  5. Question 15

    2 marks · Normal

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

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  6. Question 16

    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]
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  7. Question 17

    2 marks · Hard

    An unknown element X has the electronic configuration 2, 8, 3. State the group and period of element X in the Periodic Table.

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  8. Question 18

    5 marks · Hard

    An element Y has the atomic number 15.

    (a)

    Write the electronic configuration for element Y.

    [1 mark]
    (b)

    State the number of electrons in the outer shell of element Y.

    [1 mark]
    (c)

    Identify the group number and the period number for element Y.

    [2 marks]
    (d)

    Explain how the electronic configuration relates to the group and period for element Y.

    [1 mark]
    Answer and see the solution →

  9. Question 19

    2 marks · Hard

    Explain why an atom with the electronic configuration 2, 7 is placed in both Group 7 and Period 2 of the Periodic Table.

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