MODULE 7 CHEM ACTUAL EXAM
2026/2027 WITH 270 QUESTIONS AND
WELL-VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
GUARANTEED PASS | CHEM
MODULE 7 LATEST EXAM 2026
A triple covalent bond forms when ______ pairs of electrons are shared between
___ atoms - ANSWER-Three; two
When two atoms share electrons in a sigma bond, how do their valence atomic
orbitals overlap? - ANSWER-end-to-end
In order to obtain a noble-gas electron configuration, some atoms share more than
one pair of electrons with one or more atoms. Sharing more than one pair of
electrons forms ______ covalent bonds. - ANSWER-multiple
Which is a bond that is formed when parallel orbitals overlap, concentrating the
shared electrons above and below the line directly between the bonding atoms? -
ANSWER-Pi bond
,> Not sigma: Reason: Sigma bonds form when the valence atomic orbitals of two
atoms overlap end-to-end, concentrating the shared electrons in a bonding orbital
between the two atoms.
In general, the number of valence electrons needed to form an octet is ______ the
number of covalent bonds that can form. - ANSWER-Equal to
A double covalent bond forms when _____ pairs of electrons are shared between
______ atoms - ANSWER-Two; two
Which is the type of covalent bond that forms when a shared electron pair occupies
the space above and below the line that represents where the two atoms are joined
together? - ANSWER-Pi
A double covalent bond consists of ______ pi bond(s) and ______ sigma bond(s).
A triple covalent bond consists of ______ pi bond(s) and _______ sigma bond(s). -
ANSWER-1,1; 2,1
A covalent bond involves attractive and repulsive forces. In a molecule, nuclei and
electrons ____ each other, but nuceli _____ other nuceli, and electrons _____ other
electrons. When this balance of forces is upset, a covalent can be broken -
ANSWER-Attract; repel; repel
When parallel orbitals overlap and share electrons a(n) _____ bond forms -
ANSWER-Pi
Which factors determine bond length? - ANSWER-the sizes of the two atoms
the number of electron pairs shared
,In general, the number of valence electrons needed to form a(n) ____ equals the
number of covalent bonds that can form a(n) ______ equals the number of covalent
bonds that can form. - ANSWER-Octet
bond lengths shortest to longest bond length - ANSWER-triple covalent, double
covalent, single covalent
The type of covalent bond that forms when a shared electron pair occupies the
space above and below the line that represents where the two atoms are joined
together is called a ____ bond - ANSWER-Pi
The shorter the bond length, the _______ the bond. Therefore, a single bond, such
as that in F2, is _______ than a double bond, such as that in O2. Likewise, the
double bond in O2 is ________ than the triple bond in N2. - ANSWER-Stronger;
weaker; weaker
Which are true of multiple covalent bonds? - ANSWER-> Molecules having
multiple covalent bonds contain both sigma bonds and pi bonds.
> A double covalent bond consists of one pi bond and one sigma bond.
An energy change occurs when a bond between atoms in a molecule forms or
breaks. Energy is ________ when a bond forms, but energy must be _________ to
break a bond. - ANSWER-Released; absorbed/added/gained
True or false: It is equally easy to upset the balance of forces in all covalent bonds,
causing the bond to break. - ANSWER-False
The distance between the two bonded nuclei at the position of maximum attraction
is called - ANSWER-Bond length
, The amount of energy required to break a specific covalent bond is called bond-
_____ energy - ANSWER-Dissociation
Weakest to strongest (bond type) - ANSWER-single, double, triple
When a greater amount of energy is required to break the existing bonds in the
reactants than is released when the new bonds form in the products, the reaction is
an - ANSWER-endothermic reaction
When more energy is released during product bond formation than is required to
break bonds in the reactants, the reaction is a(n) - ANSWER-Exothermic reaction
Which is the term that describes the amount of energy required to break a specific
covalent bond? - ANSWER-bond-dissociation energy
Bond-dissociation energy indicates the strength of a chemical bond. The stronger
the bond the ____ the bond-dissociation energy - ANSWER-Higher
Which type of reaction occurs when a greater amount of energy is required to
break the existing bonds in the reactants than is released when the new bonds form
in the products? - ANSWER-Endothermic
> Why not exothermic → When more energy is absorbed to break bonds among
the reactants than is released when new bonds form among the products, there is a
net transfer of energy from the surroundings to the reaction system. The reaction,
then, is endothermic.
Which type of reaction occurs when more energy is released during product bond
formation than is required to break bonds in the reactants? - ANSWER-Exothermic
Noble gases have stable electron arrangements and therefore seldom form
compounds. The stable electron arrangements include a _________ outer energy
2026/2027 WITH 270 QUESTIONS AND
WELL-VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
GUARANTEED PASS | CHEM
MODULE 7 LATEST EXAM 2026
A triple covalent bond forms when ______ pairs of electrons are shared between
___ atoms - ANSWER-Three; two
When two atoms share electrons in a sigma bond, how do their valence atomic
orbitals overlap? - ANSWER-end-to-end
In order to obtain a noble-gas electron configuration, some atoms share more than
one pair of electrons with one or more atoms. Sharing more than one pair of
electrons forms ______ covalent bonds. - ANSWER-multiple
Which is a bond that is formed when parallel orbitals overlap, concentrating the
shared electrons above and below the line directly between the bonding atoms? -
ANSWER-Pi bond
,> Not sigma: Reason: Sigma bonds form when the valence atomic orbitals of two
atoms overlap end-to-end, concentrating the shared electrons in a bonding orbital
between the two atoms.
In general, the number of valence electrons needed to form an octet is ______ the
number of covalent bonds that can form. - ANSWER-Equal to
A double covalent bond forms when _____ pairs of electrons are shared between
______ atoms - ANSWER-Two; two
Which is the type of covalent bond that forms when a shared electron pair occupies
the space above and below the line that represents where the two atoms are joined
together? - ANSWER-Pi
A double covalent bond consists of ______ pi bond(s) and ______ sigma bond(s).
A triple covalent bond consists of ______ pi bond(s) and _______ sigma bond(s). -
ANSWER-1,1; 2,1
A covalent bond involves attractive and repulsive forces. In a molecule, nuclei and
electrons ____ each other, but nuceli _____ other nuceli, and electrons _____ other
electrons. When this balance of forces is upset, a covalent can be broken -
ANSWER-Attract; repel; repel
When parallel orbitals overlap and share electrons a(n) _____ bond forms -
ANSWER-Pi
Which factors determine bond length? - ANSWER-the sizes of the two atoms
the number of electron pairs shared
,In general, the number of valence electrons needed to form a(n) ____ equals the
number of covalent bonds that can form a(n) ______ equals the number of covalent
bonds that can form. - ANSWER-Octet
bond lengths shortest to longest bond length - ANSWER-triple covalent, double
covalent, single covalent
The type of covalent bond that forms when a shared electron pair occupies the
space above and below the line that represents where the two atoms are joined
together is called a ____ bond - ANSWER-Pi
The shorter the bond length, the _______ the bond. Therefore, a single bond, such
as that in F2, is _______ than a double bond, such as that in O2. Likewise, the
double bond in O2 is ________ than the triple bond in N2. - ANSWER-Stronger;
weaker; weaker
Which are true of multiple covalent bonds? - ANSWER-> Molecules having
multiple covalent bonds contain both sigma bonds and pi bonds.
> A double covalent bond consists of one pi bond and one sigma bond.
An energy change occurs when a bond between atoms in a molecule forms or
breaks. Energy is ________ when a bond forms, but energy must be _________ to
break a bond. - ANSWER-Released; absorbed/added/gained
True or false: It is equally easy to upset the balance of forces in all covalent bonds,
causing the bond to break. - ANSWER-False
The distance between the two bonded nuclei at the position of maximum attraction
is called - ANSWER-Bond length
, The amount of energy required to break a specific covalent bond is called bond-
_____ energy - ANSWER-Dissociation
Weakest to strongest (bond type) - ANSWER-single, double, triple
When a greater amount of energy is required to break the existing bonds in the
reactants than is released when the new bonds form in the products, the reaction is
an - ANSWER-endothermic reaction
When more energy is released during product bond formation than is required to
break bonds in the reactants, the reaction is a(n) - ANSWER-Exothermic reaction
Which is the term that describes the amount of energy required to break a specific
covalent bond? - ANSWER-bond-dissociation energy
Bond-dissociation energy indicates the strength of a chemical bond. The stronger
the bond the ____ the bond-dissociation energy - ANSWER-Higher
Which type of reaction occurs when a greater amount of energy is required to
break the existing bonds in the reactants than is released when the new bonds form
in the products? - ANSWER-Endothermic
> Why not exothermic → When more energy is absorbed to break bonds among
the reactants than is released when new bonds form among the products, there is a
net transfer of energy from the surroundings to the reaction system. The reaction,
then, is endothermic.
Which type of reaction occurs when more energy is released during product bond
formation than is required to break bonds in the reactants? - ANSWER-Exothermic
Noble gases have stable electron arrangements and therefore seldom form
compounds. The stable electron arrangements include a _________ outer energy
