A LevelChemistryCambridge (CIE)Exam Questions9. The Periodic Table: Chemical PeriodicityPeriodicity of Physical Properties of the Elements in Period 3

Periodicity of Physical Properties of the Elements in Period 3 (Cambridge (CIE) A Level Chemistry): Exam Questions

Exam code: 9701

51 mins14 questions

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Periodicity of Physical Properties of the Elements in Period 3

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1
1 mark

Which row compares the ionic radius and atomic radius of sodium and sulfur?

ionic radius

atomic radius

A

Na+ < S2-

Na < S

B

Na+ < S2-

Na > S

C

Na+ > S2-

Na > S

D

Na+ > S2-

Na < S

    Choose your answer

    2
    1 mark

    The trends in three physical properties of the elements of Period 3 are shown in the graphs.

    Three graphs showing trends in physical properties of Period 3 elements: melting point, first ionisation energy, and atomic radius

    Which physical property is not shown?

    • Electrical conductivity

    • Atomic radius

    • Melting point

    • First ionisation energy

    Choose your answer

    3
    1 mark

    Which graph shows the electronegativity of the elements Na, Mg, Al and Si, from Period 3, plotted against their first ionisation energies?

    • Graph showing electronegativity plotted against first ionisation energy for Na, Mg, Al, and Si from Period 3. Both electronegativity and first ionisation energy increase from Na to Si, with a lower first ionisation energy at Al than Mg
    • Incorrect graph of electronegativity against first ionisation energy for Na, Mg, Al and Si
    • Incorrect graph of electronegativity against first ionisation energy for Na, Mg, Al and Si
    • Incorrect graph of electronegativity against first ionisation energy for Na, Mg, Al and Si

    Choose your answer

    1
    1 mark

    Consecutive elements X, Y and Z are in Period 3. Element Y has the highest first ionisation energy and the lowest melting point of these three elements.

    Which row identifies elements X, Y and Z?

    • silicon, phosphorus, sulfur

    • sodium, magnesium, aluminium

    • aluminium, silicon, phosphorus

    • magnesium, aluminium, silicon

    Choose your answer

    2
    1 mark

    Which row correctly describes the physical properties of the substance?

    substance

    melting point

    conductivity of solid

    conductivity when added to water

    A

    Al

    high

    good

    good

    B

    NaCl

    high

    good

    good

    C

    SiO2

    high

    poor

    good

    D

    SO3

    low

    poor

    good

      Choose your answer

      3
      1 mark

      Which metal has the highest melting point?

      • Na

      • Mg

      • K

      • Al

      Choose your answer

      4
      1 mark

      The graph shows the values of log ionisation energy for the first eight ionisation energies of an element X from Period 3.

      Graph showing log10 of ionisation energy in kJ/mol against number of electrons removed, with a sharp increase after the sixth electron

      Which statement about element X is correct?

      • it reacts with excess hot NaOH (aq) to produce hydrogen gas

      • its highest oxidation state in a compound is +6

      • it forms a giant covalent oxide that is insoluble in water

      • its first ionisation energy is higher than that of the element immediately to its right in the Periodic Table

      Choose your answer

      1
      1 mark

      A student investigated the chloride of a Period 3 element and made the following observations:

      • The compound was a white crystalline solid.

      • It dissolved easily in water to give a solution of pH 12.

      • When placed in a test-tube and heated in a roaring Bunsen flame, the compound melted after several minutes of heating.

      What can be deduced from these observations?

      • At least one of the recorded observations is incorrect

      • The compound is sodium chloride, NaCl

      • The compound is silicon tetrachloride, SiCl4

      • The compound is phosphorus pentachloride, PCl5

      Choose your answer

      2
      1 mark

      Which element has the third lowest first ionisation energy in its period and the third smallest atomic radius in its group?

      • magnesium

      • boron

      • sodium

      • calcium

      Choose your answer

      3
      1 mark

      Which row describes a substance with a giant covalent structure?

      conductivity of solid

      MP / K

      BP / K

      A

      poor

      388

      718

      B

      good

      923

      1363

      C

      good

      3031

      2943

      D

      poor

      1986

      2950

        Choose your answer