11/12/25, 12:58 PM CEM 141 Chapter 3 Test EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Sol…
CEM 141 Chapter 3 Test EXAM fully solved &
updated 2025-2026(latest version verified for
accuracy) (Questions + Answers) Solved 100%
Correct!!
Save
Terms in this set (106)
Similarities between LDF they have similar causes: electrostatic attraction of the
and Covalent Bond electron of one atom to the nucleus of the other
1. magnitude of attraction
Differences between LDF
2. how the electrons are arranged in the new species
and Covalent Bond
formed by the interaction
Why do bonds form because valence electrons are attracted to the nuclei
between atoms? of other atoms
1. valence electrons from one atom become attracted
to the nucleus of the other atom
Covalent Bonds
2. each nucleus is attracting both electrons
3. when bonds form energy is released to surrounding
What is bond length? the most stable distance between atoms (lowest PE)
https://quizlet.com/1107094344/cem-141-chapter-3-test-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-… 1/18
,11/12/25, 12:58 PM CEM 141 Chapter 3 Test EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Sol…
1. atomic orbitals can combine constructively to form
a molecular orbital of lower energy (in phase)
2. atomic orbitals can combine destructively to form a
molecular orbital of higher energy (out of phase)
Molecular Orbital Theory
3. combine n atomic orbitals--> n molecular orbitals
4. Bonding and Anti-bonding orbitals
a. both are in the same place of space, just at different
energies
1. of lower energy than the atomic orbitals (typically)--
> stabilizing
Bonding Orbitals
a. electrons in bonding orbitals make the species
more stable
1. of higher energy than the atomic orbitals and
destabilizing
Anti-bonding Orbitals
a. electrons in anti-bonding orbitals make the species
less stable
1. In H2: 2 electrons in a bonding orbital make 1 bond
Why do 2 H atoms form a (H2 has one bond between 2 H atoms)
bond while 2 He atoms 2. In He: 2 electrons in a bonding MO is stabilizing,
don't? but 2 electrons in an anti-bonding MO cancel out
stabilization (so no bonds between He atoms)
1. In hydrogen-hydrogen, only the bonding MO is
occupied, leading to a net stabilization of the
interaction
a. to break the bond, enough energy has to be added
to raise an electron to the anti-bonding orbital
Bonding in H and He
2. In helium-helium, both bonding and anti-bonding
molecular orbitals are occupied. Because their
energies (negative for bonding orbital and positive
for anti-bonding orbital) are equal and opposite,
there is no net stabilization for interaction
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, 11/12/25, 12:58 PM CEM 141 Chapter 3 Test EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Sol…
If we combine 2 atoms 20
with 10 atomic orbitals
each, how many molecular
orbitals will result?
If 2 elements in the 1. O: 1s2 2s2 2p6
second row (ex. 2 O a. there are 5 atomic orbitals from each O being
atoms) were to interact, combined, 5+5= 10
how many molecular i. Answer: 10
orbitals would be
generated by the atomic
orbitals in the core and
valence shells?
How many bonds form 2 bonds (only concerned with valence electrons)
between 2 O atoms?
1. shiny
2. conduct electricity and heat
a. because electrons can move freely
What properties do metals 3. malleable and ductile
have? a. malleable because atoms can move with respect to
one another
4. may be colored (gold, copper)- silver is colorless
(like most metals)
1. lots of atomic orbitals combine with each other to
form molecular orbitals (an equal number)
2. As the number of Molecular Orbital's increases, the
How does bonding in
energy distance between them decreases and they
metals explain their
form bands of Molecular Orbitals (of almost
properties?
continuous energy)
3. electrons can move freely between Molecular
Orbitals and over whole system
https://quizlet.com/1107094344/cem-141-chapter-3-test-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-… 3/18
CEM 141 Chapter 3 Test EXAM fully solved &
updated 2025-2026(latest version verified for
accuracy) (Questions + Answers) Solved 100%
Correct!!
Save
Terms in this set (106)
Similarities between LDF they have similar causes: electrostatic attraction of the
and Covalent Bond electron of one atom to the nucleus of the other
1. magnitude of attraction
Differences between LDF
2. how the electrons are arranged in the new species
and Covalent Bond
formed by the interaction
Why do bonds form because valence electrons are attracted to the nuclei
between atoms? of other atoms
1. valence electrons from one atom become attracted
to the nucleus of the other atom
Covalent Bonds
2. each nucleus is attracting both electrons
3. when bonds form energy is released to surrounding
What is bond length? the most stable distance between atoms (lowest PE)
https://quizlet.com/1107094344/cem-141-chapter-3-test-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-… 1/18
,11/12/25, 12:58 PM CEM 141 Chapter 3 Test EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Sol…
1. atomic orbitals can combine constructively to form
a molecular orbital of lower energy (in phase)
2. atomic orbitals can combine destructively to form a
molecular orbital of higher energy (out of phase)
Molecular Orbital Theory
3. combine n atomic orbitals--> n molecular orbitals
4. Bonding and Anti-bonding orbitals
a. both are in the same place of space, just at different
energies
1. of lower energy than the atomic orbitals (typically)--
> stabilizing
Bonding Orbitals
a. electrons in bonding orbitals make the species
more stable
1. of higher energy than the atomic orbitals and
destabilizing
Anti-bonding Orbitals
a. electrons in anti-bonding orbitals make the species
less stable
1. In H2: 2 electrons in a bonding orbital make 1 bond
Why do 2 H atoms form a (H2 has one bond between 2 H atoms)
bond while 2 He atoms 2. In He: 2 electrons in a bonding MO is stabilizing,
don't? but 2 electrons in an anti-bonding MO cancel out
stabilization (so no bonds between He atoms)
1. In hydrogen-hydrogen, only the bonding MO is
occupied, leading to a net stabilization of the
interaction
a. to break the bond, enough energy has to be added
to raise an electron to the anti-bonding orbital
Bonding in H and He
2. In helium-helium, both bonding and anti-bonding
molecular orbitals are occupied. Because their
energies (negative for bonding orbital and positive
for anti-bonding orbital) are equal and opposite,
there is no net stabilization for interaction
https://quizlet.com/1107094344/cem-141-chapter-3-test-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-… 2/18
, 11/12/25, 12:58 PM CEM 141 Chapter 3 Test EXAM fully solved & updated 2025-2026(latest version verified for accuracy) (Questions + Answers) Sol…
If we combine 2 atoms 20
with 10 atomic orbitals
each, how many molecular
orbitals will result?
If 2 elements in the 1. O: 1s2 2s2 2p6
second row (ex. 2 O a. there are 5 atomic orbitals from each O being
atoms) were to interact, combined, 5+5= 10
how many molecular i. Answer: 10
orbitals would be
generated by the atomic
orbitals in the core and
valence shells?
How many bonds form 2 bonds (only concerned with valence electrons)
between 2 O atoms?
1. shiny
2. conduct electricity and heat
a. because electrons can move freely
What properties do metals 3. malleable and ductile
have? a. malleable because atoms can move with respect to
one another
4. may be colored (gold, copper)- silver is colorless
(like most metals)
1. lots of atomic orbitals combine with each other to
form molecular orbitals (an equal number)
2. As the number of Molecular Orbital's increases, the
How does bonding in
energy distance between them decreases and they
metals explain their
form bands of Molecular Orbitals (of almost
properties?
continuous energy)
3. electrons can move freely between Molecular
Orbitals and over whole system
https://quizlet.com/1107094344/cem-141-chapter-3-test-exam-fully-solved-updated-2025-2026latest-version-verified-for-accuracy-questions-answers-… 3/18
