Elements, Compounds, and Mixtures
Classify each of the pictures below by placing the correct label in the blanks below:
D= Mixture of compounds
A= Element
B= Compound
E= Mixture of elements and compounds
C= Mixture of elements
Each circle represents an atom and each different color represents a different kind of
atom. If two atoms are touching then they are bonded together.
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4
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8)
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14)
_____
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Worksheet: Classification of Mafter
I.
Name.
Fill in the Blanks
A(n) ,eh.-ni g,~c’t is a pure substance that is made of only one kind of atom.
The symbol for a(n) Pit pnt~X is always one or two letters. When the symbol
contains two letters, the first letter is always (‘a.pi1a_&i~L6, and the second
letter is always )OLAYC/ ~&44LA(n)
is a pure substance containing two or more elements that are
combined. A(n). ~e*picaacL is represented by a chemical
The elements in a(n) ~Ali~spr~JacL always combine in
proportions.
a!
_____________
_____________
U
A(ri) iii~cxkirc
is made of two or more substances that are ,i1~F oL~~~-~; cJj2c~
combined. A(n) *AX4ilJr-t_
that is. uniformly mixed is called
A special name for this is a(n) ~3i~..bcJl-~
A(n) ‘yvJ_~y1-u’r-e_
tha~ is not
uniformly mixed is called \2.Jos(il..skA A special type of mixture that is a solid
~NAkk ‘sc1rtrrC
of two or more tWetals is called a(n) OQVn
_____________
.
.
II.
Classify each of the following as an element (E), compound (C), homogeneous
mixture,, (~ocnc’)
heterogeneous mixture (HPygO)
chocolate chip cookie
oxygen gas
salt water
taco
gold
carbon dioxide
water
kool aid
table salt
muddy water
potassium
brass
graphite
glass
air
______
6
FoR
4J ThE
~ fr~c\9 Q~c u.5c-~S
____
____
C
C.
C.
MD~c ~y4\*V~ DJCC
~
______
ke~vm
_______
~“t.
flLt.
E
______
~i€≠ro
CcMmu
\
Word Bank
Compound
Homogeneous
Capitalized
Definite
Lower case
Element
Not chemically
Solution
Alloy
Mixture
Chemically
Foimula
Heterogeneous
Name
Date
CHAPTER 1
___________________
Class
__________________
REVIEW
Matter and Change
MIXED REVIEW
SHORT ANSWER Answer the following questions in the space provided.
1. Classify each ~f the following as a homogeneous or heterogeneous substance.
homogeneous
a. sugar
_________________
homogeneous
d. plastic wrap
homogeneous
b. iron filings
heterogeneous
e. cement sidewalk
heterogeneous
c. granola bar
2. For each type of investigation, select the most appropriate branch of chemistry from the following
choices: organic chemistry, analytical chemistry, biochemistry, theoretical chemistry. More than
one branch may be appropriate.
analytical chemistry
a. A forensic scientist uses chemistry to find
information at the scene of a crime.
theoretical chemistry!
biochemistry
S
biochemistry
b. A scientist uses a computer model to see how an
enzyme will function.
c. A professor explores the reactions that take place
in a human liver.
organic chemistry
d. An oil éompany scientist tries to design a better
gasoline.
analytical chemistry
biochemistry!
analytical chemistry
e. An anthropologist tries to find out the nature of a
substance in a mummy’s wrap.
f. A pharmaceutical company examines the protein
on the coating+ of a .virus
3. Foreach of the following types of chemical investigations, determine whether the investigation is
basic research, applied research, or technological devElopment. More than one choice may apply.
N
basic research
~
~ked res~o6
applie,)~≤arch/
techno~ical dev’~{~pment
~basic research)\
,// applied research
7’
basic research
MODERN CHEMISTRY
copyright © by Heft, Rinehart and Winston. All rights resen’ed.
a. A university plans to map all the genes on human
chromosomes.
b. A research team intends to find out why a lake
remains polluted to try to find a way to clean it up.
c. A science teacher looks for a solvent that will allow
graffiti to be removed easily.
d. A cancer research institute explores the chemistry
of the cell.
e. A professor explores the toxic compounds in
marine animals.
MATtER AND CIIANGE
7
Name_________________________ Date___________ Class
I
MIXED REVIEW continued
I
4. Use the periodic table to identify the name, group number, and period number of the following
elements:
chlorine, Group 17, Period ~
a. Cl
magnesium, Group 2, Period 3
b. Mg
tungsten, Group 6, Period 6
~
w
iron, Group 8, Period 4
d. Fe
tin, Group 14, Period 5
e. Sn
5. What is the difference between extensive and intensive propbrties?
Extensive properties depend on the amount of matter present; intensive properties
do not.
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6. Consider the burning of gasoline and the evaporation of gasoline. Which process represents a
chemical change and which represents a physical change? Explain your answer.
The burning of gasoline represents
a chemical change
because the gasoline is being
changed into substances with different identities. Evaporation involves a physical
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change; the identity of gasoline remains unchanged.
7. Describe the difference between a heterogeneous mixture and a homogeneous mixture, and give an
example of each.
A heterogeneous mixture, such as blood, is made of components with different
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physical properties. A homogeneous mixture, such as stainless steel, has a single set
of physical properties.
8. Construct a concept map that includes the following terms: atom, element, compound, pure
substance, mixture, homogeneous, and heterogeneous.
Mutter
made
pure substances,
which can be
elements
compounds
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I:
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mixtures,
which can be
heterogeneous
homogeneous
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which are
made of
ci: I
I
atoms
8
MA1TER AND CHANCE
MODERN CHEMISTRY
Copyright © by Holt, Rinehart and Winston. All rights reserved.