EXERCISES CLASSIFICATION OF MATTER

Q1.

Material	Pure Substance or Mixture	Element, Compound, Homogeneous, Heterogeneous
sugar + pure water (C12H22O11 + H2O)
Iron (Fe)
limestone (CaCO3)
orange juice
Pacific Ocean
air inside a balloon
aluminum (Al)
magnesium (Mg)
acetylene (C2H2)
tap water in a glass
pure water (H2O)
chromium (Cr)
salt + pure water (NaCl + H2O)
benzene (C6H6)
baking soda (NaHCO3)

Q2.

Classify each of the following as elements (E), compounds (C) or Mixtures (M).  Write the letter X if it is none of these.

1. Diamond(C)                     

2. Sugar (C6H12O6)             

3. Milk            

4. Iron (Fe)

5. Air                          

6. Sulfuric Acid (H2SO4)    

7. Gasoline               

8. Electricity

9. Krypton (K)           

10. Bismuth (Bi)                  

11. Uranium (U)      

12. Popcorn

13. Water (H2O)       

14. Alcohol (CH3OH)          

15. Pail of Garbage 

16. A cat

17. Ammonia (NH3)

18. Salt (NaCl)                     

19. Energy                

20. Gold (Au)

21. Wood                  

22. Ink                                   

23. Pizza

24. Dry Ice (CO2)     

25. Baking Soda (NaHCO3)          

26. Titanium (Ti)      

27. Concrete

Q3.

Read the following information on elements, compounds and mixtures.  Fill in the blanks where necessary.

Elements (pure substances):

1.      A pure substance containing only one kind of _______1_____.

2.      An element is always uniform all the way through (homogeneous).

3.      An element _______2______ be separated into simpler materials (except during nuclear reactions).

4.      Over 100 existing elements are listed and classified on the _________3_______.

Compounds (pure substances):

5.      A pure substance containing two or more kinds of ______4_________.

6.      The atoms are _________5________ combined in some way.  Often times (but not always) they come together to form groups of atoms called molecules. 

7.      A compound is always homogeneous (uniform).

8.      Compounds __________6_________ be separated by physical means.  Separating a compound requires a chemical reaction. 

9.      The properties of a compound are usually different than the properties of the elements it contains. 

Mixtures:

10.  Two or more ________7________ or ________8________ NOT chemically combined.

11.  No reaction between substances.

12.  Mixtures can be uniform (called ____________9____________) and are known as solutions.

13.  Mixtures can also be non-uniform (called __________10______________).

14.  Mixtures can be separated into their components by chemical or physical means.