Revision NotesExam QuestionsFlashcardsTarget TestPast Papers
IBChemistryDPHLExam QuestionsModels of the Particulate Nature of MatterElectronic Configurations

Electronic Configurations (DP IB Chemistry: HL): Exam Questions

3 hours52 questions

Select a download format for Electronic Configurations

Scroll for more

Select an answer set to view for
Electronic Configurations

Easy
Medium
Hard
11 mark

Using the Aufbau Principle and Hund’s rule, deduce which element below has the greatest number of unpaired electrons in its ground state.

  • Z = 13

  • Z = 14

  • Z = 15

  • Z = 16

Choose your answer

21 mark

Which electron transition would emit radiation of the longest wavelength?

2-1-e-q10-mcqs-ib-chemistry

    Choose your answer

    31 mark

    Why is the second ionisation energy of magnesium higher than the first ionisation energy?

    • Less shielding

    • Ionic radius increases

    • Nuclear charge is increasing

    • Greater attraction between positive nucleus and outer electron

    Choose your answer

    4
    Sme Calculator    1 mark

    Which is true about the emission spectrum of hydrogen in the visible region?

    • The lines converge at longer wavelengths

    • The lines converge at higher frequency

    • The lines come from transitions between n=∞ and n=1

    • The lines are regularly spaced

    Choose your answer

    5
    Sme Calculator    1 mark

    The frequency of the point of convergence on a hydrogen emission spectrum is 32.883 x 1014 s-1.

    What is the ionisation energy for one atom of hydrogen?

    (h = 6.63 x 10-34 J s)

    • 2.18 x 10-18 J

    • 2.02 x 10-49 J

    • J

    • 4.96 x 1045 J

    Choose your answer

    6
    Sme Calculator    1 mark

    The first five ionisation energies of an element are shown below.

    What element could this ionisation energy graph belong to?

    successive-ionisation-energy

    • N

    • P

    • Al

    • Na

    Choose your answer

    7
    Sme Calculator    1 mark

    Which are correct explanation(s) for the increase in ionisation energy across a period?

    I. Nuclear charge increases

    II. Atomic radius decreases

    III. Shielding remains constant

    • I and II only

    • I and III only

    • I and III only

    • I,II and III

    Choose your answer

    8
    Sme Calculator    1 mark

    Which spectrum belongs to hydrogen?

    eARGWkkX_hydrogen-spectrum

      Choose your answer

      11 mark

      There are six unpaired electrons in atoms of element Z. What could element Z be?

      • sulfur

      • iron

      • carbon

      • chromium

      Choose your answer

      21 mark

      The diagram shows three orbitals labelled 1, 2 and 3. 

      2-1-m-q5-mcqs-ib-chemistry

      What is the correct label for each orbital?

      • px, py and pz

      • s, pz and py

      • s, px and pz

      • s, px and py

      Choose your answer

      31 mark

      What is the electronic configuration of an ion with a single negative charge and atomic number 17?

      • 1s2 2s2 2p6 3s1 3p6

      • 1s2 2s2 2p6 3s2 3p6

      • 1s2 2s2 2p6 3s1 3p5

      • 1s2 2s2 2p6 3s2 3p5

      Choose your answer

      41 mark

      What is the correct sequence for the orbitals shown in an atom of vanadium in order of decreasing energy?

      • 3s 3p 4s 3d

      • 4s 3d 3s 3p

      • 4s 3d 3p 3s

      • 3d 4s 3p 3s

      Choose your answer

      51 mark

      The second ionisation energy of magnesium is 1451 kJ mol-1. 

      Which equation correctly represents this statement?

      • Mg+(g) → Mg2+(g) + e-          ΔHӨ = -1451 kJ mol-1

      • Mg+(g) → Mg2+(g) + e-          ΔHӨ = +1451 kJ mol-1

      • Mg(g) → Mg2+(g) + 2e-         ΔHӨ  = +1451 kJ mol-1

      • Mg(g) → Mg+(g) + e-            ΔHӨ = -1451 kJ mol-1

      Choose your answer

      61 mark

      X, Y and Z  are consecutive elements in the third Period of the Periodic Table. Element Y has the highest first ionisation energy and also the lowest melting point of these three elements. 

      What could be the identities of X, Y and Z?

      • silicon, phosphorus, sulfur 

      • sodium, magnesium, aluminium

      • aluminium, silicon, phosphorus

      • magnesium, aluminium, silicon

      Choose your answer

      71 mark

      An element in the d block of the Periodic Table forms a +4 ion and has the electron configuration of [Ar] 3d1.

      What is the identity of the element?

      • Chromium

      • Copper

      • Vanadium

      • Silicon

      Choose your answer

      81 mark

      Deduce the correct information about the element tin, Sn (Z = 50)

       

      Number of occupied main energy levels

      Number of electrons in the highest main energy level

      A

      4

      4

      B

      4

      14

      C

      5

      4

      D

      5

      14

        Choose your answer

        91 mark

        Successive ionisation energies for an element, Y, are shown in the table below.

        Electrons removed

        1st

        2nd

        3rd

        4th

        5th

        Ionisation energy / kJ mol-1

        736

        1450

        7740

        10500

        13600

        What is the most likely formula for the ion of Y?

        • Y+

        • Y2+

        • Y3+

        • Y4+

        Choose your answer

        101 mark

        Values for the successive ionisation energies for an unknown element are given in the table below.

        First ionisation energy / kJ mol-1

        Second ionisation energy / kJ mol-1

        Third ionisation energy / kJ mol-1

        Fourth ionisation energy / kJ mol-1

        420

        3600

        4400

        5900

        In which group of the periodic table would the unknown element be found?

        • 1

        • 2

        • 13

        • 14

        Choose your answer

        111 mark

        The graph shows the first ionisation energies of some consecutive elements

        x-and-y-ionisation-energies

        Which statement is correct?

        • Y is in Group 13

        • Y is in Group 12

        • X is in Group 15

        • X is in Group 18

        Choose your answer

        121 mark

        Which transition on the diagram corresponds to the ionisation of hydrogen in the ground state?

        ionisation-of-ground-state-hydrogen

          Choose your answer

          11 mark

          Element X is in Period 2 and has the first seven ionisation energies in kJ mol-1 as shown.

              1300    

              3380    

              5330    

              7460    

              11 010    

              13 320    

              71 200    

          What is the electronic configuration of element X?

          • 1s2 2s2 2p4

          • 1s2 2s2 2p2

          • 1s2 2s2 2p3

          • 1s2 2s2 2p6

          Choose your answer

          21 mark

          For the successive ionisation energies of oxygen, where would the highest jump be expected to occur?

          • Between the first and second

          • Between the fifth and sixth

          • Between the sixth and seventh

          • Between the seventh and eighth

          Choose your answer

          31 mark

          Which species produces a half-filled set of p orbitals on losing an electron?

          • Li+

          • F

          • N

          • N-

          Choose your answer

          41 mark

          Which statement explains why electrons pair up in orbitals before occupying an orbital of a higher energy level?

          • the energy from repulsion is greater than the jump to a higher orbital

          • electrons occupy higher energy orbitals before lower energy orbitals

          • electrons in lower orbitals have higher energies

          • the energy from repulsion is less than the jump to a higher orbital

          Choose your answer

          51 mark

          Which equation is correct for the third ionization energy for the element nitrogen?

          • N+(g) → N4+(g)  + 3e-

          • N2+(g) → N3+(g)  + e-

          • N(g) → N3+(g)  + 3e-

          • N3+(g) → N4+(g)  + e-

          Choose your answer

          61 mark

          A line emission spectrum occurs when

          • electrons release energy as they move from high to low energy levels

          • electrons release energy as they move from low to high energy levels

          • electrons absorb energy as they move from high to low energy levels

          • electrons absorb energy as they move from low to high energy levels

          Choose your answer

          71 mark

          A spectral line that would be found in the visible spectrum of the hydrogen emission spectrum would be

          • n1 → n2

          • n2 → n3

          • n3 → n2

          • n3 → n∞

          Choose your answer

          8
          Sme Calculator          1 mark

          Which statement is true about the spectra shown?

          hydrogen-spectrum-hl

          • All the lines in R have the same energy

          • Q and S could represent line emission spectra

          • Only S shows the characteristic pattern of a line emission spectrum

          • P indicates the element has 4 pairs of electrons at different energy levels 

          Choose your answer

          9
          Sme Calculator          1 mark

          The energy absorbed at the limit of convergence for helium is 19.6 x 10-18 J per atom.

          What is the wavelength, in m, corresponding to this energy?

          (c = 3.00 x 108 ms-1, h = 6.63 x 10-34 Js)

          • 8.89 x 1024

          • 1.01 x 10-8

          • 4.33 x 10-59

          • 2.31 x 1058

          Choose your answer

          10
          Sme Calculator          1 mark

          The first ionisation energies (in kJ mol-1) of five successive elements are:

          2081, 496, 738, 578, 787

          What could these elements be?

          • First five elements in a period

          • Second to the sixth elements in a period

          • Last four elements of one period and the first one of the next period

          • Last element of one period and the first four elements of the next period

          Choose your answer

          11
          Sme Calculator          1 mark

          A period 3 element forms an oxide M2O3.

          Which represents the first four successive ionisation energies of M?

          Ionisation energy / kJmol-1

           

          First

          Second

          Third

          Fourth

          A.

          496

          4560

          6940

          9540

          B.

          578

          1820

          2740

          11600

          C.

          1012

          1907

          2914

          4964

          D.

          736

          1450

          7740

          10500

            Choose your answer

            12
            Sme Calculator            1 mark

            Between which ionisation energies of silicon will there be the greatest difference?

            • Between the second and fourth ionisation energies

            • Between the first and third ionisation energies

            • Between the fourth and fifth ionisation energies

            • Between the fifth and sixth ionisation energies

            Choose your answer