Elements, Compounds and Mixtures
Save
Edit
Host a game
Live GameLive
Homework
Solo Practice
Practice
15 QuestionsShow answers
  • Question 1
    30 seconds
    Q.

    Which of the following is an example of the formation of a mixture?

    answer choices

    Rust forming on an iron nail.

    Sugar crystals dissolving in water.

    Sodium and chlorine forming table salt.

    Hydrogen and oxygen reacting to produce oxygen.

  • Question 2
    30 seconds
    Q.

    Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?

    answer choices

    Oxygen is more reactive than air.

    Oxygen has a higher density than air.

    Oxygen goes under a phase change, whereas air is always a gas.

    Oxygen contains only one substance, but air contains several substances.

  • Question 3
    30 seconds
    Q.

    Which of the following is an example of of a container filled with a pure substance rather than with a mixture?

    answer choices

    A tire filled with air.

    A jar filled with salt water.

    A balloon filled with helium.

    A glass filled with chocolate milk.

  • Question 4
    30 seconds
    Q.

    When electricity passes through water, hydrogen and oxygen are produced. Which table correctly labels the compounds and elements involved in the process?

    answer choices

    Water-->Compound

    Hydrogen-->Compound

    Oxygen--->Element

    Water-->Compound

    Hydrogen--->Element

    Oxygen--->Compound

    Water--->Compound

    Hydrogen--->Element

    Oxygen--->Element

  • Question 5
    30 seconds
    Q.

    The chemical equation shown below represents a reaction that produces fuel for certain cars.

    CO + H2O------->CO2 + H2


    Which substance in this equation is classified as an element?

    answer choices

    CO

    O2

    CO2

    H2

  • Question 6
    30 seconds
    Q.

    Which changes MUST happen for elements to become a compound?

    answer choices

    elements are heated

    a gas becomes a liquid

    elements dissolve in water

    chemical bonds form between atoms.

  • Question 7
    30 seconds
    Q.

    Water (H2O), is not found on the periodic table because water is a...

    answer choices

    atom

    liquid

    mixture

    compound

  • Question 8
    30 seconds
    Q.

    Which of the following explains why saltwater is considered a mixture?

    answer choices

    It is composed of one element.

    It is composed of one compound.

    It is composed of two or more substances and has new chemical properties.

    It is composed of two or more substances and retains their own chemical properties.

  • Question 9
    30 seconds
    Q.

    Oxygen and iron combine chemically to form rust. Rust is classified as which of the following?

    answer choices

    an atom.

    an element.

    a compound.

    a mixture.

  • Question 10
    30 seconds
    Q.

    When the elements copper (Cu) and oxygen (O) chemically combine, they form...

    answer choices

    an ion

    a gas

    a compound

    a mixture

  • Question 11
    30 seconds
    Q.

    This image is a model of...

    answer choices

    an element

    a compound

    a homogenous mixture

    a heterogeneous mixture

  • Question 12
    30 seconds
    Q.

    This picture is a model of...

    answer choices

    an element

    a compound

    a homogenious mixture

    a heterogeneous mixture.

  • Question 13
    30 seconds
    Q.

    This picture is a model of a...

    answer choices

    element

    compound

    homogeneous mixture

    heterogeneous mixture

  • Question 14
    30 seconds
    Q.

    The image below is an example of

    answer choices

    an atom

    a molecule

    a homogeneous mixture

    a heterogeneous mixture

  • Question 15
    30 seconds
    Q.

    The image below is an example of

    answer choices

    a homogeneous mixture

    a compound

    a heterogeneous mixture

    an element

Report Quiz
Join a game