PSC 1121 - Chapter 9 (Chemical Bonds) Exam
With Complete Solutions
Match the chemical term with the appropriate definition. - ANSWER - Atom ---
Smallest unit of an element that can exist alone or in combination with other
elements
- Compound --- Substance formed from the chemical combination of two or more
elements
- Molecule --- Smallest particle of a compound or a gaseous element that can
exist and still retain the characteristic chemical properties of a substance
Match the substance with its most common, naturally occurring form. - ANSWER
- Monatomic molecule --- Helium
- Diatomic molecule --- Oxygen, hydrogen
- Triatomic molecule --- Ozone
The transformation of one substance to another by breaking and/or forming
chemical bonds is called a chemical ______________. - ANSWER Blank 1: reaction
A generic chemical equation is depicted below. Match the symbols in the
chemical equation with their correct identities.
A + B → C - ANSWER A and B ----- Reactant(s)
→ ---- Yields
C --- Product(s)
Chemical energy describes changes in internal ____________ energy. - ANSWER
Blank 1: potential
An atom is the smallest unit of a(n) ___________ hat can exist alone. When atoms
are chemically ______________ , together they form a compound. The smallest
particle of a compound is called a(n) ______________. - ANSWER Blank 1: element
Blank 2: bound or bonded
Blank 3: molecule
The outermost electrons of an element are called the __________ electrons. The
electrons that are in stable, fully occupied orbitals are called __________
electrons. - ANSWER Blank 1: valence
Blank 2: inner or core
, Match the term concerning types of molecules with the appropriate definition. -
ANSWER - Monatomic molecule --- A molecule that consists of one atom
- Diatomic molecule --- A molecule that consists of two of the same atom bound
together
- Triatomic molecule --- A molecule that consists of three of the same atom
bound together
Which of the statements about the octet rule is true? - ANSWER The octet rule
states that atoms tend to try to achieve the same electron configuration as the
closest noble gas.
Which of the following statements about a chemical reaction are true? -
ANSWER - A chemical reaction is the process used to describe a chemical
change.
- Chemical bonds are broken and/or made during a chemical reaction.
When chlorine (Cl) ionizes it tends to Blank___________ electrons. - ANSWER gain
1
A statement that expresses the changes that occur during a chemical reaction is
a chemical __________. - ANSWER Blank 1: equation
Select all that apply
Which of the following statements correctly describe what happens when Ca
ionizes? - ANSWER - When Ca ionizes, it has the same electron configuration as
Ar.
- When Ca ionizes, it has a net charge of +2.
Reason:
When an atom ionizes, its number of protons does not change. Ca will always
have 20 protons in the nucleus. When Ca ionizes, it will have 18 electrons
surrounding the nucleus.
Reason:
Ca is in group IIA and will tend to lose two electrons.
New chemicals are produced when chemical ____________ are broken and then
reformed in different ways. - ANSWER Blank 1: bonds
Elements combine in three general ways. In Blank__________ compounds,
electrons are transferred from one element to the other, whereas in
Blank____________ compounds, electrons are shared between atoms. Third, in
Blank_____________ bonding, electrons are shared between a large number of
atoms in an electron sea. - ANSWER ionic; covalent; metallic
With Complete Solutions
Match the chemical term with the appropriate definition. - ANSWER - Atom ---
Smallest unit of an element that can exist alone or in combination with other
elements
- Compound --- Substance formed from the chemical combination of two or more
elements
- Molecule --- Smallest particle of a compound or a gaseous element that can
exist and still retain the characteristic chemical properties of a substance
Match the substance with its most common, naturally occurring form. - ANSWER
- Monatomic molecule --- Helium
- Diatomic molecule --- Oxygen, hydrogen
- Triatomic molecule --- Ozone
The transformation of one substance to another by breaking and/or forming
chemical bonds is called a chemical ______________. - ANSWER Blank 1: reaction
A generic chemical equation is depicted below. Match the symbols in the
chemical equation with their correct identities.
A + B → C - ANSWER A and B ----- Reactant(s)
→ ---- Yields
C --- Product(s)
Chemical energy describes changes in internal ____________ energy. - ANSWER
Blank 1: potential
An atom is the smallest unit of a(n) ___________ hat can exist alone. When atoms
are chemically ______________ , together they form a compound. The smallest
particle of a compound is called a(n) ______________. - ANSWER Blank 1: element
Blank 2: bound or bonded
Blank 3: molecule
The outermost electrons of an element are called the __________ electrons. The
electrons that are in stable, fully occupied orbitals are called __________
electrons. - ANSWER Blank 1: valence
Blank 2: inner or core
, Match the term concerning types of molecules with the appropriate definition. -
ANSWER - Monatomic molecule --- A molecule that consists of one atom
- Diatomic molecule --- A molecule that consists of two of the same atom bound
together
- Triatomic molecule --- A molecule that consists of three of the same atom
bound together
Which of the statements about the octet rule is true? - ANSWER The octet rule
states that atoms tend to try to achieve the same electron configuration as the
closest noble gas.
Which of the following statements about a chemical reaction are true? -
ANSWER - A chemical reaction is the process used to describe a chemical
change.
- Chemical bonds are broken and/or made during a chemical reaction.
When chlorine (Cl) ionizes it tends to Blank___________ electrons. - ANSWER gain
1
A statement that expresses the changes that occur during a chemical reaction is
a chemical __________. - ANSWER Blank 1: equation
Select all that apply
Which of the following statements correctly describe what happens when Ca
ionizes? - ANSWER - When Ca ionizes, it has the same electron configuration as
Ar.
- When Ca ionizes, it has a net charge of +2.
Reason:
When an atom ionizes, its number of protons does not change. Ca will always
have 20 protons in the nucleus. When Ca ionizes, it will have 18 electrons
surrounding the nucleus.
Reason:
Ca is in group IIA and will tend to lose two electrons.
New chemicals are produced when chemical ____________ are broken and then
reformed in different ways. - ANSWER Blank 1: bonds
Elements combine in three general ways. In Blank__________ compounds,
electrons are transferred from one element to the other, whereas in
Blank____________ compounds, electrons are shared between atoms. Third, in
Blank_____________ bonding, electrons are shared between a large number of
atoms in an electron sea. - ANSWER ionic; covalent; metallic
