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Term 2G2 / G3

Sec 3 Chemistry WA2 practice paper

WA2 is usually the Term 2 assessment. In the common scheme it covers the heart of Sec 3 Chemistry: atomic structure and isotopes, ionic and covalent bonding, structures and properties, and the first mole calculations.

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Total marks
40
Time
55 min
Covers
Chapters 3–5 (atomic structure, chemical bonding and structure, mole concept and stoichiometry)
Format
10 MCQ + 5 structured

The paper and mark scheme

Set out like a school paper, with a separate mark scheme for checking.

Question paper

WA2 Practice Paper

40 marks · 55 min · 6 pages

10 multiple-choice questions and structured questions with answer lines. Chapters 3–5 (atomic structure, chemical bonding and structure, mole concept and stoichiometry).

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Mark scheme

PRO

WA2 Practice Paper — mark scheme

Answers · Marking points · 3 pages

Model answers with a mark for each creditworthy point — for marking at home or in class.

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What’s tested

Commonly Chapters 3–5 (atomic structure, chemical bonding and structure, and chemical calculations with the mole concept). Some schools stop before stoichiometry, so check your school’s outline.

  1. 3Atomic StructureTheme 2 · Atomic Structure and StoichiometryNotes & quiz
  2. 4Chemical Bonding & StructureTheme 2 · Atomic Structure and StoichiometryNotes & quiz
  3. 5Mole Concept & StoichiometryTheme 2 · Atomic Structure and StoichiometryNotes & quiz

How to use this paper

  1. 1Print the paper, or open the PDF and write on paper.
  2. 2Set a timer for 55 min and work without notes.
  3. 3Mark your answers with the mark scheme, one point at a time.
  4. 4Redo every question you lost marks on, then revise that topic.

Preview

The first questions of Section A, as they appear on the paper.

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Section A: Multiple choice[10 marks]

Answer all questions. For each question, write the letter (A, B, C or D) of the correct answer.

  1. 1

    An atom of element Z has 11 protons and 12 neutrons. What is the electronic configuration of Z?

    1. A2.8.3
    2. B2.8.2
    3. C2.8.1
    4. D2.10.1
    ( )
  2. 2

    The atoms ³⁵₁₇X and ³⁷₁₇Y are

    1. Aatoms of different elements
    2. Bisotopes of the same element
    3. Cions of the same element
    4. Dthe same isotope written two ways
    ( )
  3. 3

    How many electrons are present in the Ca²⁺ ion? (proton number of Ca = 20)

    1. A20
    2. B22
    3. C2
    4. D18
    ( )
  4. 4

    Which molecule contains a triple covalent bond?

    1. AN₂
    2. BO₂
    3. CH₂O
    4. DCH₄
    ( )

Revision checklist

  • Write electronic configurations, place elements in groups and periods, and deduce ion charges from outer electrons.
  • Describe ionic, covalent and metallic bonding with electron transfer or sharing — and link each structure to two properties.
  • Explain the graphite-versus-diamond and simple-molecular-versus-giant-covalent property comparisons.
  • Convert mass ↔ moles ↔ number of particles fluently, and moles ↔ gas volume using 24 dm³/mol.
  • Calculate concentrations in mol/dm³ from moles and volumes, watching cm³ to dm³ conversion.
  • Mark your Chapter 3–5 topical questions strictly, then attempt this paper against the clock.

Exam tips

  • Show the formula (n = m ÷ Mr, n = V ÷ 24) before substituting — method marks survive arithmetic slips.
  • Convert cm³ to dm³ by dividing by 1000 before dividing into moles.
  • For bonding questions, mention charges, transfer or sharing, and electrostatic attraction — not just “opposites attract”.
  • State symbols matter when the question gives states; include them when asked.

Questions about the WA2

What is tested in Sec 3 Chemistry WA2?

Typically Chapter 3 (protons, neutrons, electrons, isotopes, configurations), Chapter 4 (ionic, covalent, metallic bonding; giant and simple structures) and Chapter 5 (mole-mass-volume-concentration calculations and reacting ratios). Confirm with your school’s assessment outline.

Do I need to memorise the molar volume?

Yes: one mole of any gas occupies 24 dm³ at room temperature and pressure in the 6092 data treatment. Most schools expect you to recall it for volume-mole conversions.

Is this paper based on a real school paper?

No. QuizQuip papers are original material written against the syllabus. QuizQuip is not affiliated with MOE or SEAB.