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Name ___________________________
Class ___________________
Date _____________
Chapter 5 The Periodic Table
Chapter Test B
Multiple Choice
Write the letter that best answers the question or completes the statement on
the line provided.
1. In a periodic table, a set of properties repeats from
a. element to element.
b. group to group.
c. column to column.
d. row to row.
2. The usefulness of Mendeleev’s periodic table was
confirmed by
a. the discovery of subatomic particles.
b. its immediate acceptance by other scientists.
c. the discovery of elements with predicted properties.
d. the discovery of the nucleus.
3. Figure 5-1 shows a portion of a blank periodic table. Identify
the segments labeled A and B.
A
a. A and B are both
periods.
B
b. A is a period and
B is a group.
c. A and B are both
groups.
d. A is a group and
B is a period.
Figure 5-1
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4. One-twelfth the mass of a carbon-12 atom is used to
define a(an)
a. atomic number.
b. atomic mass.
c. mass number.
d. atomic mass unit.
5. How is the atomic mass of an element determined?
a. Average the atomic masses of all its isotopes.
b. Use the atomic mass of the most abundant isotope.
c. Take a weighted average of the masses of the isotopes
present in nature.
d. Count the number of protons and neutrons in an atom of
the element.
6. Which list of elements contains only metals?
a. helium, carbon, gold
b. sodium, chromium, copper
c. iodine, iron, nickel
d. phosphorus, nitrogen, oxygen
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Chapter 5 Test B
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Name ___________________________
Class ___________________
Date _____________
7. Which statement is true about the metalloid silicon?
a. Silicon is a better conductor of an electric current than
silver is.
b. Silicon does not conduct electric current under any
conditions.
c. Silicon’s ability to conduct an electric current does not
vary with temperature.
d. Silicon is a better conductor of an electric current than
sulfur is.
8. The column on the far left of the periodic table contains the
a. most reactive metals.
b. most reactive nonmetals.
c. least reactive nonmetals. d. least reactive metals.
9. As you move from left to right across a period, the number
of valence electrons
a. increases.
b. stays the same.
c. increases and then decreases.
d. decreases.
10. Compared with Group 1A elements, Group 7A elements
have
a. more atoms in ground state.
b. more valence electrons.
c. more isotopes.
d. fewer valence electrons.
11. The tendency of an element to react chemically is closely
related to
a. its atomic mass.
b. attractions between its atoms.
c. the number of valence electrons in atoms of the element.
d. the ratio of protons to neutrons in atoms of the element.
13. Which of these Group 7A elements is the most reactive?
a. Cl (chlorine)
b. I (iodine)
c. F (fluorine)
d. Br (bromine)
14. Which of the following gases emit colors when an electric
current is applied?
a. hydrogen and helium b. helium and neon
c. fluorine and chlorine d. oxygen and nitrogen
15. Which element is found in most of the compounds in your
body except for water?
a. iodine
b. potassium
c. iron
d. carbon
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Physical Science
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Chapter 5 Test B
© Pearson Education, Inc. All rights reserved.
12. Which of these Group 1A elements is the most reactive?
a. Cs (cesium)
b. Li (lithium)
c. K (potassium)
d. Na (sodium)
Name ___________________________
Class ___________________
Date _____________
Completion
Complete each statement on the line provided.
1. Mendeleev organized elements in his periodic table in order of
increasing
.
2. Mendeleev’s periodic table was useful because it enabled
scientists to predict properties of unknown
.
3. Phosphorus is one block to the left of sulfur in the periodic table.
The atomic number of sulfur is 16. The atomic number of
phosphorus is
.
4. The atomic mass unit (amu) is defined as one-twelfth the mass of
a(an)
-12 atom.
5. Elements can be classified as metals, nonmetals, and
.
6. From left to right across a period in the periodic table, elements
become less
and more
in their properties.
7. Element 3, lithium, has one valence electron, and element 4,
beryllium, has two valence electrons. Element 5, boron, has
valence electrons.
8. In general, a(an)
metal will be more reactive
than an alkaline earth metal in the same period.
9. Although they are called
lights, they can
contain any noble gas.
10. Reactive elements, such as alkali metals and halogens, are found
in nature only as
.
Short Answer
© Pearson Education, Inc. All rights reserved.
Use complete sentences to write the answers to the questions on
the lines provided.
1. Suppose you are looking at elements in the periodic table in this
order: element 23, element 24, element 25, element 26, and so on. Are
you looking across a period or down a group? Explain your answer.
2. What determines an element’s chemical properties?
3. On the periodic table, there are two numbers in the block for
the element krypton (Kr): 36 and 83.80. What are each of these
numbers, and what do they represent?
Physical Science
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Chapter 5 Test B
43
Name ___________________________
Class ___________________
Date _____________
4. Sodium chloride is a compound of sodium and chlorine. Which of
these elements is the alkali metal, and which is the halogen?
5. Why is argon gas used instead of air in light bulbs that contain a
filament that is heated to glowing?
Using Science Skills
Use the chart to answer each question. Write the answers on a separate sheet
of paper.
1
2
3. . .
. . . 18
He
C
Be
Na*
N
F
?
V
I
* Atomic number = 11
Figure 5-2
Essay
Write the answer to the question on a separate sheet of paper.
1. Why were the elements gallium (Ga), scandium (Sc), and
germanium (Ge) important to Mendeleev?
44
Physical Science
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Chapter 5 Test B
© Pearson Education, Inc. All rights reserved.
1. Using Tables and Graphs Which of the elements shown in
Figure 5-2 are in the same period?
2. Classifying Which element in Figure 5-2 is a transition metal?
Which is a noble gas?
3. Using Tables and Graphs Which elements in Figure 5-2 have the
same number of valence electrons? How do you know?
4. Comparing and Contrasting Based on what you know about
elements and the periodic table, compare and contrast the elements
beryllium (Be) and iodine (I).
5. Inferring Find the block labeled ? in Figure 5-2. Predict the
properties of this element. What is its atomic number? How many
valence electrons does it have? Which of the elements shown in
Figure 5-2 will it most resemble?