C1.1-E1 : 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.