Assessment

Atoms, molecules, and ions

Atoms, molecules, and ions

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ninja coder

Chemistry

Grade IX

10 plays

100 players

ninja coder's avatar

ninja coder

Chemistry

Grade IX

10 plays

100 players

Worksheet

  • 1.

    Multiple Choice

    1 pts•30 s

    Identify the smallest unit of an element that retains its chemical properties.

    Answer choices

    Molecule

    Atom

    Ion

    Compound

  • 2.

    Multiple Choice

    1 pts•30 s

    Explain what a molecule is.

    Answer choices

    A charged particle

    A group of atoms bonded together

    A single atom

    An element with no bonds

  • 3.

    Multiple Choice

    1 pts•30 s

    Describe the characteristic of an ion.

    Answer choices

    It is always neutral

    It has a positive or negative charge

    It is a group of uncharged atoms

    It cannot form compounds

  • 4.

    Multiple Choice

    1 pts•30 s

    Name an example of a diatomic molecule.

    Answer choices

    Water (H2O)

    Oxygen (O2)

    Sodium chloride (NaCl)

    Carbon dioxide (CO2)

  • 5.

    Multiple Choice

    1 pts•30 s

    Clarify how a cation is formed.

    Answer choices

    By gaining electrons

    By losing electrons

    By sharing electrons

    By remaining neutral

  • 6.

    Multiple Choice

    1 pts•30 s

    Point out the difference between an atom and a molecule.

    Answer choices

    An atom is a group of molecules

    A molecule is a group of atoms bonded together

    An atom is always charged

    A molecule is smaller than an atom

  • 7.

    Multiple Choice

    1 pts•30 s

    Indicate an example of an ion.

    Answer choices

    Helium (He)

    Sodium ion (Na+)

    Nitrogen (N2)

    Carbon dioxide (CO2)

  • 8.

    Multiple Choice

    1 pts•30 s

    State how an anion differs from a cation.

    Answer choices

    An anion is positively charged, cation is negatively charged

    An anion is negatively charged, cation is positively charged

    Both are neutral

    Both are molecules

  • 9.

    Multiple Choice

    1 pts•30 s

    Describe the composition of a water molecule.

    Answer choices

    One hydrogen and one oxygen atom

    Two hydrogen and one oxygen atom

    One hydrogen and two oxygen atoms

    Two hydrogen and two oxygen atoms

  • 10.

    Multiple Choice

    1 pts•30 s

    Explain why ions are formed during chemical reactions.

    Answer choices

    To maintain a neutral charge

    Due to gain or loss of electrons

    To break chemical bonds

    To form uncharged molecules