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Atoms, Elements and Compounds

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Atomic structure and the Periodic Table

Subtopic

Atomic structure and the Periodic Table under Atoms, Elements and Compounds for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the overall charge of the nucleus of any atom?

    A.

    Negative

    B.

    Neutral

    C.

    Positive

    D.

    Variable depending on the electrons

  2. 2.

    Which statement describes a physical property of Argon?

    A.

    It is a highly reactive metal

    B.

    It is a colorless, odorless gas

    C.

    It forms diatomic molecules like Cl2\text{Cl}_2

    D.

    It is a liquid at room temperature

  3. 3.

    Which of these elements is a metalloid (semi-metal)?

    A.

    Sulfur

    B.

    Silicon

    C.

    Iron

    D.

    Argon

Download the worksheet for Atoms, Elements and Compounds - Atomic structure and the Periodic Table to practice offline. It includes additional chapter-level practice questions.

Isotopes

Subtopic

Isotopes under Atoms, Elements and Compounds for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If an isotope has 19 protons and 20 neutrons, what is its symbol?

    A.

    2039Ca^{39}_{20}Ca

    B.

    1939K^{39}_{19}K

    C.

    1920K^{20}_{19}K

    D.

    3919Y^{19}_{39}Y

  2. 2.

    Which of these defines the atomic number of an element?

    A.

    The number of neutrons in the nucleus

    B.

    The total number of protons and neutrons

    C.

    The number of protons in the nucleus

    D.

    The total number of particles in the atom

  3. 3.

    A neutral atom of an isotope of Lithium (37Li^{7}_{3}Li) has how many electrons?

    A.

    3

    B.

    4

    C.

    7

    D.

    10

Download the worksheet for Atoms, Elements and Compounds - Isotopes to practice offline. It includes additional chapter-level practice questions.

Ionic bonding

Subtopic

Ionic bonding under Atoms, Elements and Compounds for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following ions is formed when a nitrogen atom gains electrons to achieve a stable configuration?

    A.

    N−N^-

    B.

    N2−N^{2-}

    C.

    N3−N^{3-}

    D.

    N3+N^{3+}

  2. 2.

    Which of the following is the formula for lead(II) nitrate?

    A.

    PbNO3PbNO_3

    B.

    Pb(NO3)2Pb(NO_3)_2

    C.

    Pb2NO3Pb_2NO_3

    D.

    Pb2(NO3)2Pb_2(NO_3)_2

  3. 3.

    When an atom of an element from Group 16 forms an ion, what is the charge?

    A.

    2+2+

    B.

    6+6+

    C.

    2−2-

    D.

    6−6-

Download the worksheet for Atoms, Elements and Compounds - Ionic bonding to practice offline. It includes additional chapter-level practice questions.

Covalent bonding

Subtopic

Covalent bonding under Atoms, Elements and Compounds for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is characteristic of simple molecular structures?

    A.

    Conductivity in molten state

    B.

    Very high melting points

    C.

    Weak forces between molecules

    D.

    Hard and brittle

  2. 2.

    In the molecule Cl2Cl_2, what kind of bond holds the two atoms together?

    A.

    Ionic

    B.

    Metallic

    C.

    Single covalent

    D.

    Double covalent

  3. 3.

    Which of these is a liquid covalent compound at room temperature?

    A.

    NaClNaCl

    B.

    H2OH_2O

    C.

    O2O_2

    D.

    CC (diamond)

Download the worksheet for Atoms, Elements and Compounds - Covalent bonding to practice offline. It includes additional chapter-level practice questions.

Macromolecules and metallic bonding

Subtopic

Macromolecules and metallic bonding under Atoms, Elements and Compounds for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which subatomic particle is not part of the 'delocalized sea' in a metal?

    A.

    Valence electron

    B.

    Proton

    C.

    Conduction electron

    D.

    Free electron

  2. 2.

    What is the force of attraction that holds a metal lattice together?

    A.

    Magnetic attraction

    B.

    Electrostatic attraction

    C.

    Gravitational attraction

    D.

    Nuclear attraction

  3. 3.

    Which of these statements about silicon(IV) oxide is true?

    A.

    It conducts electricity when molten

    B.

    It is a liquid at room temperature

    C.

    It has a high melting point

    D.

    It is composed of SiO2SiO_2 molecules

Download the worksheet for Atoms, Elements and Compounds - Macromolecules and metallic bonding to practice offline. It includes additional chapter-level practice questions.

Atoms, Elements and Compounds - Grade 12 Chemistry (IGCSE) | Krit.club