Elements, Compounds & Mixtures Worksheet
Part 1: 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 ____________.
2. An element is always uniform all the way through (homogeneous).
3. An element _____________ be separated into simpler materials (except during nuclear
reactions).
4. Over 100 existing elements are listed and classified on the ____________________.
Compounds (pure substances):
5. A pure substance containing two or more kinds of _______________.
6. The atoms are _________________ 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 ___________________ 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 ________________ or _________________ NOT chemically combined.
11. No reaction between substances.
12. Mixtures can be uniform (called ________________________) and are known as
solutions.
13. Mixtures can also be non-uniform (called ________________________).
14. Mixtures can be separated into their components by chemical or physical means.
15. The properties of a mixture are similar to the properties of its components.
Chemistry: Classifying Matter
Classify each of the materials below. In the center column, state whether the material is a pure substance or a
mixture. If the material is a pure substance, further classify it as either an element or compound in the right
column. Similarly, if the material is a mixture, further classify it as homogeneous or heterogeneous in the right
column. Write the entire word in each space to earn full credit.
Material
concrete
sugar + pure water
(C12H22O11 + H2O)
iron filings (Fe)
limestone (CaCO3)
orange juice (w/pulp)
Pacific Ocean
air inside a balloon
aluminum (Al)
magnesium (Mg)
acetylene (C2H2)
tap water in a glass
soil
pure water (H2O)
chromium (Cr)
Chex mix
salt + pure water
(NaCl + H2O)
benzene (C6H6)
muddy water
brass
(Cu mixed with Zn)
baking soda (NaHCO3)
Pure Substance
or Mixture
Element, Compound,
Homogeneous, Heterogeneous
Name: ________________________
Hour:
____
Date:
___________
Chemistry: Classifying Matter
Classify each of the materials below. In the center column, state whether the material is a pure substance or a
mixture. If the material is a pure substance, further classify it as either an element or compound in the right
column. Similarly, if the material is a mixture, further classify it as homogeneous or heterogeneous in the right
column. Write the entire word in each space to earn full credit.
Material
Pure Substance
or Mixture
Element, Compound,
Homogeneous, Heterogeneous
concrete
Mixture
Heterogeneous
sugar + pure water
(C12H22O11 + H2O)
Mixture
Compound
iron filings (Fe)
Pure Substance
Element
limestone (CaCO3)
Pure Substance
Element
orange juice (w/pulp)
Mixture
Heterogeneous
Pacific Ocean
Mixture
Heterogeneous
air inside a balloon
Mixture
Homogeneous
aluminum (Al)
Pure Substance
Element
magnesium (Mg)
Pure Substance
Element
acetylene (C2H2)
Pure Substance
Compound
tap water in a glass
Mixture
Homogeneous
soil
Mixture
Heterogeneous
pure water (H2O)
Pure Substance
Compound,
chromium (Cr)
Pure Substance
Element,
Chex mix
Mixture
Heterogeneous
salt + pure water
(NaCl + H2O)
Mixture
Homogeneous
benzene (C6H6)
Pure Substance
Compound
muddy water
Mixture
Heterogeneous
brass
(Cu mixed with Zn)
Mixture
Homogeneous
baking soda (NaHCO3)
Pure Substance
Compound