Chemistry Worksheet: Introduction To The Elements Page 3
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416. The elements with atomic numbers from 58-71 are in the Lanthanide Series.
a. Where does the name “Lanthanide Series” come from?
b. How many elements are in that series?
17. The elements with atomic numbers from 90-103 are in the Actinide Series.
a. Where does the name “Actinide Series” come from?
b. How many elements are in that series?
18. What period are all the elements in the Actinide Series in?
19. Why do you think the standard form of the periodic table has these two sections at
the bottom instead of imbedded?
20. How can you tell where the Lanthanide and Actinide Series belong when you are
looking at your “normal” periodic table?
Model E: Characteristics of Elements
Malleable- can be rolled or hammered into sheets
Ductile- can be drawn into thin wire
High Tensile Strength- resists breaking when pulled on
Brittle- hard but breaks or shatters easily
21. Turn on your LabQuest and plug in the voltage sensor. Be sure the reading is less
than 0.01 V. If its not, ask for help calibrating it. If you clip each end of the wire to
the same piece of a substance (but in different locations), you can test the
conductivity of the substance. If a substance does conduct electricity, the reading
will be close to 0 (or between 0.004 and -0.004). Of the reading is higher than that,
the substance does not conduct well.
22. Test each of the substances and record the results in the table below. Record a “C”
for conducts or a “D” for does not conduct:
Sample
A
B
C
D
C or D
23. Apply pressure to a small piece of each of your substances by pressing it between
the table and your hand. Classify each substance as either (M) “malleable” or (B)
“brittle”.
Sample
A
B
C
D
M or B
24. Sample A is a metal. List Sample A’s characteristics in the table below as
characteristics of metals. Sample B is a nonmetal. List Sample B’s characteristics as
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