Name: ______________________________Class: _________________ Date: _________________
Assessment
Chemical Bonding
Teacher Notes and Answers
SECTION: INTRODUCTION TO CHEMICAL BONDING
1.
2.
3.
4.
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7.
8.
9.
10.
c
b
b
a
a
b
d
c
a
b
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Chemistry
1
Quiz
Name: ______________________________Class: _________________ Date: _________________
Assessment
Chemical Bonding
Section Quiz: Introduction to Chemical Bonding
In the space provided, write the letter of the term or phrase that best completes
each statement or best answers each question.
_____ 1. Ionic bonds form as a result of the electrostatic attraction between
a. dipoles.
b. electrons.
c. ions.
d. nuclei.
_____ 2. A single covalent bond involves the sharing of
a. only one electron.
b. two electrons.
c. three electrons.
d. a variable number of electrons, which depends on the bonding
atoms.
_____ 3. Use the table below to choose the pair of elements that will most likely
have the least ionic character.
Element
Electronegativity
Na
Cl
a.
b.
c.
d.
0.9
3.0
Element
O
H
Electronegativity
3.5
2.1
Na and Cl
O and Cl
H and O
Na and O
_____ 4. Use the table below to choose the pair of elements that will most likely
have the greatest ionic character.
Element
K
Br
a.
b.
c.
d.
Electronegativity
0.8
2.8
Element
N
S
Electronegativity
3.0
2.5
K and N
K and S
N and Br
S and Br
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Chemistry
2
Quiz
Name: ______________________________Class: _________________ Date: _________________
Section Quiz, continued
_____ 5. The measure of an atom’s ability to attract electrons is its
a. electronegativity
b. polarization.
c. ionization
d. electron affinity
_____ 6. Atoms that are bonded with an electronegativity difference of 0 to 0.3
are generally considered to be
a. negatively charged compounds.
b. nonpolar-covalent compounds.
c. polar-covalent compounds.
d. ionic compounds.
_____ 7. What is the apparent charge on the chlorine atom in the molecule HCl?
a. +1
b. 1
c. δ+
d. δ
_____ 8. Atoms seldom exist as independent particles in nature because
a. as single particles, most atoms have low potential energy.
b. their electronegativity is much lower when they combine with other
atoms.
c. atoms are more stable when they combine with other atoms.
d. neutral particles are rare.
_____ 9. When an atom completely gives up its valence electrons to another
atom, they form a bond that is considered to be
a. purely ionic.
b. partially ionic.
c. polar-covalent.
d. nonpolar-covalent.
_____ 10. You can estimate the degree to which a bond between two atoms is
ionic or covalent by calculating the
a. distance between the atoms’ nuclei.
b. difference in the atoms’ electronegativities.
c. atoms’ atomic radii.
d. number of atoms in the compound.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Modern Chemistry
3
Quiz