Practice 2.2                                                                              Name ____________________________________

 

 

1. Use the following words to fill in the diagram on the right

 

            Compound

            Element

            Heterogeneous

            Homogeneous

            Matter

            Mixture

            Substance

 

 

 

 

 

 

 

 

2. Write the formula for a molecule made of the following elements

a. Hydrogen peroxide – 2 hydrogen and 2 oxygen

b. Epsom salts– 1 magnesium, 1 sulfur, 4 oxygen

c. Ammonium Dichromate–  2 nitrogen, 8 hydrogen, 2 chromium, and 7 oxygen

d. Octane  8 carbon, 18 hydrogen

3. Identify each of the following as a gas, liquid, or solid.

______________________ a. The particles are closely packed together, but they can still slide past each other.

______________________ b. The particles are in a constant state of motion and rarely stick together.

______________________ c. The particles are locked in fixed positions.

 

4. Draw a picture of how the molecules are arranged in a solid, liquid, and gas.