Electrons & Ions (Edexcel International A Level Chemistry)

Exam Questions

21 mins8 questions
11 mark

Which equation represents the second ionisation energy of chlorine?

  • Cl(g) + e→ Cl2− (g)

  • Cl (g) + 2e → Cl2− (g)

  • 2Cl (g) → 2Cl+ (g) + 2e

  • Cl+ (g) → Cl2+ (g) + e

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21 mark

Which equation represents the second ionisation energy of magnesium?

  • Mg (g) → Mg2+ (g) + 2e

  • Mg+ (g) → Mg2+ (g) + e

  • Mg (s) → Mg2+ (s) + 2e

  • Mg+ (s) → Mg2+ (s) + e

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31 mark

Several factors may affect ionisation energies:

I) the number of protons increases

II) the outer electron is further from the nucleus

III) the amount of shielding increases

IV) the number of unpaired outer electrons increases

Which factors explain the decrease in ionisation energy as Group 1 is descended?

  • I and II

  • II and III

  • III and IV

  • I, II, III and IV

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11 mark

The graph shows log (ionisation energy) against ionisation number for the successive ionisations of an element.

q5-paper-1-june-2021-edexcel-ial-chemistry

In this element, how many quantum shells contain electrons, and how many electrons are in the outer quantum shell?

      Number of quantum shells
containing electrons
Number of electrons in the
outer quantum shell
  A 3 2
  B 3 5
  C 5 2
  D 5 5

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    21 mark

    A stable ion, M3+, contains 18 electrons.

    In which block of the Periodic Table is element M found?

    • s

    • p

    • d

    • f

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    31 mark

    Which ion has the electronic configuration 1s22s22p63s23p6 in its ground state?

    • Al3+

    • Cl

    • N3−

    • Na+

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    4
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    1 mark

    A p-block element in Period 3 of the Periodic Table reacts to form an ionic compound.

    What could be the electronic configuration of the ion formed by this element?

    • 1s22s22p63s2

    • 1s22s22p63s23p6

    • 1s22s22p63s23p63d10

    • 1s22s22p63s23p63d104s24p6

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