Chemical Bonding

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Chemical Bonding
Chapter 13
Preview
CRCT Preparation
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CRCT Preparation
Chapter 13
1. How many electrons are in the second energy
level of the atom shown? A 2 B 7 C 8 D 9
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CRCT Preparation
Chapter 13
1. How many electrons are in the second energy
level of the atom shown? A 2 B 7 C 8 D 9
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CRCT Preparation
Chapter 13
2. Which of the following statements about helium
atoms is true? A Helium atoms can never have a
full set of valence electrons. B Helium atoms
need only 2 valence electrons to have a full
outermost energy level. C Helium atoms do not
have valence electrons. D Helium atoms have the
same number of valence electrons as sulfur atoms
do.
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CRCT Preparation
Chapter 13
2. Which of the following statements about helium
atoms is true? A Helium atoms can never have a
full set of valence electrons. B Helium atoms
need only 2 valence electrons to have a full
outermost energy level. C Helium atoms do not
have valence electrons. D Helium atoms have the
same number of valence electrons as sulfur atoms
do.
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CRCT Preparation
Chapter 13
3. Sodium chloride, or table salt, forms when a
chlorine atom takes an electron from a
neighboring sodium atom. Which of the following
describes the force that holds sodium chloride
together? A an ionic bond B a hydrogen bond C a
metallic bond D a covalent bond
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CRCT Preparation
Chapter 13
3. Sodium chloride, or table salt, forms when a
chlorine atom takes an electron from a
neighboring sodium atom. Which of the following
describes the force that holds sodium chloride
together? A an ionic bond B a hydrogen bond C a
metallic bond D a covalent bond
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CRCT Preparation
Chapter 13
4. An aluminum ion has 13 protons, 14 neutrons,
and 10 electrons. What is the charge of an
aluminum ion? A 10 B 3 C 1 D 3
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CRCT Preparation
Chapter 13
4. An aluminum ion has 13 protons, 14 neutrons,
and 10 electrons. What is the charge of an
aluminum ion? A 10 B 3 C 1 D 3
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CRCT Preparation
Chapter 13
5. What property of copper allows copper wire to
bend without breaking? A Copper atoms have 29
protons. B Copper is found in Group 11 on the
periodic table. C Copper atoms do not have a full
outermost energy level. D Copper atoms form
metallic bonds with each other.
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CRCT Preparation
Chapter 13
5. What property of copper allows copper wire to
bend without breaking? A Copper atoms have 29
protons. B Copper is found in Group 11 on the
periodic table. C Copper atoms do not have a full
outermost energy level. D Copper atoms form
metallic bonds with each other.
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CRCT Preparation
Chapter 13
6. According to the electron-dot diagram of
oxygen shown, how many more valence electrons
does the oxygen atom need to fill its outermost
energy level? A 1 B 2 C 6 D 8
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CRCT Preparation
Chapter 13
6. According to the electron-dot diagram of
oxygen shown, how many more valence electrons
does the oxygen atom need to fill its outermost
energy level? A 1 B 2 C 6 D 8
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CRCT Preparation
Chapter 13
7. The ions that make up an ionic compound are
bonded in a repeating three-dimensional pattern.
What is this pattern called? A chloride
lattice B covalent bond C crystal
lattice D crystal pattern
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CRCT Preparation
Chapter 13
7. The ions that make up an ionic compound are
bonded in a repeating three-dimensional pattern.
What is this pattern called? A chloride
lattice B covalent bond C crystal
lattice D crystal pattern
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CRCT Preparation
Chapter 13
8. Which of the following forms when a neutral
atom loses an electron? A a negative atom B a
neutral ion C a positive ion D a negative ion
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CRCT Preparation
Chapter 13
8. Which of the following forms when a neutral
atom loses an electron? A a negative atom B a
neutral ion C a positive ion D a negative ion
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CRCT Preparation
Chapter 13
9. During a laboratory experiment at Georgia
State University, Juanita observes a model of two
bonded atoms. She is told that the atoms are both
nonmetals. Which of the following is a valid
conclusion? A She is looking at a model of atoms
held together by a covalent bond. B She is
looking at a model of atoms held together by an
ionic bond. C She is looking at a model of a
metalloid. D She is looking at a model of a
crystal lattice.
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CRCT Preparation
Chapter 13
9. During a laboratory experiment at Georgia
State University, Juanita observes a model of two
bonded atoms. She is told that the atoms are both
nonmetals. Which of the following is a valid
conclusion? A She is looking at a model of atoms
held together by a covalent bond. B She is
looking at a model of atoms held together by an
ionic bond. C She is looking at a model of a
metalloid. D She is looking at a model of a
crystal lattice.
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CRCT Preparation
Chapter 13
10. Which of an atoms electrons are most likely
to be involved in chemical bonding? Why?
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CRCT Preparation
Chapter 13
10. Answer - Full-credit answers should include
the following points The valence electrons are
most likely to be involved in chemical bonding.
When two atoms are close to each other, the
outermost electrons of one atom are closest to
the nucleus of the other atom. The attraction
between the outermost electrons in one atom and
the positively-charged nucleus of the other atom
contributes to the bond between the two atoms.
The outermost electrons are shared, lost, or
gained most easily.
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CRCT Preparation
Chapter 13
11. Why do atoms of the noble gases, in Group 18
on the periodic table, usually not form chemical
bonds?
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CRCT Preparation
Chapter 13
11. Answer - Full-credit answers should include
the following points The number of electrons
in the outermost energy level of an atom
determines whether an atom will form
bonds. Atoms of the noble gases (Group 18) do
not usually form chemical bonds because each atom
has a full set of valence electrons. When the
outermost energy level of an atom is full, the
atom does not usually form bonds.