Year 8 Chemistry - Review Questions - Mr. Hung

20 Questions
Year 8 Chemistry - Review Questions - Mr. Hung

This quiz will test how much you know about Element related categories such as Metals, Nonmetals, Atoms, Compounds and Elements. See how much you know about elements and their properties. Questions also include physical ad chemical changes, particle theory and atomic structures.

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Questions and Answers
  • 1. 
    What are some properties that an element is Metal?
    • A. 

      It's shiny, soluble,and bendable

    • B. 

      It's flat, black and a conductor of electricity

    • C. 

      It's shiny bendable and a good conductor of electricity

    • D. 

      It's shiny, brittle and a good conductor of heat

  • 2. 
    What is an example of a Metal?
    • A. 

      Carbon

    • B. 

      Copper

    • C. 

      Silicon

    • D. 

      Neon

  • 3. 
    Which one of these are a Non-metal?
    • A. 

      Oxygen

    • B. 

      Hydrogen

    • C. 

      Neon

    • D. 

      All of the above

  • 4. 
    When trying to identify a Non-metal you should
    • A. 

      Find the mass of the object.

    • B. 

      See if the object has some of the oppisite physical properties of a Metal.

    • C. 

      Make sure that it is a good Conductor of heat, Bendable,and Shiny

    • D. 

      It must be in gas state

  • 5. 
    The center of an atom is its
    • A. 

      Nucleus

    • B. 

      Proton

    • C. 

      Neutron

    • D. 

      Electron

  • 6. 
    Most of an atom is made up of
    • A. 

      It's Electrons

    • B. 

      Empty space

    • C. 

      Taken up space

    • D. 

      None of the above

  • 7. 
    A compound is a substance with
    • A. 

      More than two atoms of the same element.

    • B. 

      Two or more elements mixed together.

    • C. 

      Only one element.

    • D. 

      Two or more elements chemically combined

  • 8. 
    The compound is?
    • A. 

      Air

    • B. 

      Water

    • C. 

      Carbon dioxide

    • D. 

      Oxygen

  • 9. 
    Which metal is not existed as a natural metal?
    • A. 

      Sodium

    • B. 

      Copper

    • C. 

      Gold

    • D. 

      Silver

  • 10. 
    Which is not a correct description of an element?
    • A. 

      Only one kind of atoms

    • B. 

      Pure substance

    • C. 

      Can be found in the periodic table

    • D. 

      Can be broken down into different substances,

  • 11. 
    A physical change has the following features:
    • A. 

      New substances are formed; can't be changed back (irreversible)

    • B. 

      No new substances are formed; can be changed back (reversible)

    • C. 

      New substances are formed; can be changed back (reversible)

    • D. 

      No new substances are formed; can't be changed back (irreversible)

  • 12. 
    Which gas is the lightest (lowest density)?
    • A. 

      Oxygen

    • B. 

      Carbon dioxide

    • C. 

      Hydrogen

    • D. 

      Helium

  • 13. 
    The following gases exist as molecules EXCEPT
    • A. 

      Oxygen

    • B. 

      Neon

    • C. 

      Carbon dioxide

    • D. 

      Nitrogen

  • 14. 
    One of the evidence for a chemical reaction is the formation of a precipitate. It is
    • A. 

      A solid formed by mixing two solutions.

    • B. 

      A gas formed by mixing two liquids.

    • C. 

      A liquid formed by mixing two gases.

    • D. 

      A solid formed by heating a liquid.

  • 15. 
    Which of the following does not belong to the element - CARBON?
    • A. 

      Graphite

    • B. 

      Charcoal

    • C. 

      Diamond

    • D. 

      Glass

  • 16. 
    Which is the correct word equation for burning magnesium in air?
    • A. 

      Magnesium + magnesium oxide --- > oxygen

    • B. 

      Magnesium + oxygen ---- > magnesium oxide

    • C. 

      Magnesium oxide ---- > magnesium + oxygen

    • D. 

      Magnesium ----- > oxygen + magnesium oxide

  • 17. 
    Copper sulphate is a blue crystal with a formula of , what is the total number of atoms in one molecule of this compound?
    • A. 

      4

    • B. 

      5

    • C. 

      6

    • D. 

      7

  • 18. 
    Which of the following pair is CORRECT?
    • A. 

      Magnesium ---- Ma

    • B. 

      Potassium ----- K

    • C. 

      Sodium ------ So

    • D. 

      Silicon ------ S

  • 19. 
    Sublimation is a process in which
    • A. 

      A gas changes to a solid directly on heating

    • B. 

      A solid changes to a gas directly on heating

    • C. 

      A liquid changes to a gas on heating

    • D. 

      A solid changes to a liquid and then to a gas on heating

  • 20. 
    Aluminium can be represented by    in the periodic table. Which of the following is INCORRECT?
    • A. 

      The mass number is 27.

    • B. 

      The proton number is 13

    • C. 

      The neutron number is 13

    • D. 

      The electron number is 13