Bonding Worksheet Page 3
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1
2
3Choose the letter of the best answer.
An ice cube (solid H
O) and a scoop of table
6.
2
salt (NaCl) are left outside on a warm, sunny
1.
What is the atomic number of calcium?
Teachers can monitor student progress and
day. Which best explains why the ice cube melts
supply remediation when necessary.
20
6
B
A
and the salt does not?
D
48
S
8.3.f
C
40.08
The attractive forces between molecules of
A
H
O are much weaker than those between
Use the electron dot diagrams below to
2
ions in NaCl.
Standards Practice
answer Questions 2–5.
B
NaCl can dissolve in H
O.
2
The mass of the H
O was less than the mass
C
1.
B;
S
8.3.f
Electron Dot Diagrams
2
of the NaCl.
C;
2.
S
8.3.b
NaCl is white and H
O is colorless.
D
S
8.3.c
K
O
Mg
Al
2
3.
C;
S
8.3.b
The diagram below shows the crystal
4.
C;
S
8.3.b
structure of sodium chloride. Use the diagram
D;
5.
S
8.3.f
Which element is the most likely to lose two
2.
to answer Question 7.
electrons and form an ion with a charge of 2+?
6.
A;
S
8.3.c
potassium (K)
A
B;
7.
S
8.3.c
B
oxygen (O)
magnesium (Mg)
+
C
Na
aluminum (Al)
D
S
8.3.b
–
Cl
3.
Oxygen has 6 valence electrons, as indicated by
the 6 dots around the letter symbol “O.” Based
on this information, how many covalent bonds
8.
Valence electrons—potassium, 1; calcium,
could an oxygen atom form?
4; aluminum, 3; oxygen, 6; iodine, 7. KI,
six
three
A
B
CaO, AlI
, K
O.
S
8.3.b, 8.3.f
3
2
C
two
D
none
S
8.3.b
If a reaction occurs between potassium (K) and
4.
oxygen (O), what will be the ratio of potassium
ions to oxide ions in the resulting compound,
7.
In a crystal of sodium chloride, each sodium
potassium oxide?
ion is attracted to the
1 : 1
1 : 2
A
B
A
other sodium ions surrounding it.
C
2 : 1
D
2 : 2
S
8.3.b
chloride ions surrounding it.
B
neutral sodium atoms surrounding it.
C
5.
The element boron (B) is directly above
aluminum (Al) on the periodic table. Which
D
neutral chlorine atoms surrounding it.
statement about boron is true?
S
8.3.c
Boron is in the same period as aluminum
A
and has two valence electrons.
Boron is in the same group as aluminum
B
and has two valence electrons.
C
Boron is in the same period as aluminum
Use the periodic table to find the number of
8.
and has three valence electrons.
valence electrons for potassium (K), calcium (Ca),
aluminum (Al), oxygen (O), and iodine (I). Then
D
Boron is in the same group as aluminum and
has three valence electrons.
write the formulas for the following compounds:
S
8.3.f
potassium iodide, calcium oxide, aluminum
iodide, and potassium oxide.
S
8.3.b, 8.3.f
◆ 207
Chapter 5
S
8.3.c
Performance Assessment In their
Teaching Resources
compounds. They should note any
presentations, students should describe how
differences and consider how the differences
Laboratory Manual TE
their models represent atoms, bonds, and
affect the quality and usefulness of the
• Standards Investigation Scoring Rubric
compounds. They also should explain why
models. To help improve their models,
The Standards Investigation Scoring Rubric
they chose the materials they did and
students might say they would like to know
will help you evaluate students’ work. If you
describe any problems they had building
more about relative sizes of atoms of
share the rubric in advance, students will
their models. After the presentations, suggest
different elements or more about the
know what is expected of them.
that students compare their models with
modern atomic model.
other students’ models of the same
207
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