CHEM 120-CHAMBERLAIN EXAM 3 STUDY
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
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1. How many nonbonding electron pairs (lone pairs) are present in H-Br? -
ANSWER ✔ 3
2. How many bonding electron pairs are present in N? - ANSWER ✔ 3
3. How many bonds does nitrogen typically form? - ANSWER ✔ Three
4. Which of the following statements contrasting covalent bonds and ionic
bonds is correct? - ANSWER ✔ Covalent bonds usually involve two
nonmetals and ionic bonds usually involve a metal and nonmetal
5. Which atom in chlorous acid (HCLO2) are involved in a coordinate covalent
bond? - ANSWER ✔ Oxygen and chlorine
6. How many valence electrons are in the lewis structure for C2H3O2? -
ANSWER ✔ 24
,7. What is the VSEPR theory based on? - ANSWER ✔ Electrons pairs in the
valence shell of an atom adopt an arrangement in space that minimizes the
repulsions between the like-charged electron pairs
8. If the central atom in a molecule has four electron groups, it is
____________ and has bond angles of ____________. - ANSWER ✔
Tetrahedral; 109 degrees
9. How many electron groups does the central atom in CO2 contain? -
ANSWER ✔ Two
10.in atoms, electrons will occupy the lowest energy orbitals available -
ANSWER ✔ aufbau principle
11.the assignment of all of the electrons in an atom into specific shells and
subshells - ANSWER ✔ electron configuration
12.how many electrons can an s subshell hold - ANSWER ✔ 2
13.how many electrons can a p subshell hold - ANSWER ✔ 6
14.how many electrons can a d subshell hold - ANSWER ✔ 10
15.how many electrons can each orbital in an electron configuration hold -
ANSWER ✔ 2
,16.two electrons in the same orbital cannot have the same spin - ANSWER ✔
pauli exclusion principle
17.filling orbitals - ANSWER ✔ 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f,
5d, 6p, 7s, 5f, 6d, 7p
18.Anomalies in Configurations - ANSWER ✔ Chromium, copper do not
follow pattern
19.Isoelectronic - ANSWER ✔ describes atoms/ions having identical electron
configurations:
20.Atomic radius Trends - ANSWER ✔ •Increase going down a column
•As atomic number increases, so does the number of valence electrons. More
electrons mean more electron-electron repulsion, which increases the size of
the atom.
•
•Decrease going across a row
•Increased effective nuclear charge (Zeff) moving across row
•Increased attraction for valence electrons → decreased atomic size
21.Octet Rule - ANSWER ✔ Atoms tend to lose, gain, or share electrons to
obtain a set of eight valence electrons
22.What are Alkanes - ANSWER ✔ a hydrocarbon containing only single
covalent bonds
23.What are Alkenes - ANSWER ✔ Hydrocarbons with one or more carbon-
carbon double bonds
, 24.What are alkynes? - ANSWER ✔ Hydrocarbons with triple bonds
25.Saturated - ANSWER ✔ single bonds only
26.Unsaturated - ANSWER ✔ double bonds and triple bonds
27.cyclic hydrocarbons - ANSWER ✔ compounds that contain a hydrocarbon
ring. starts with prefix cyclo-
28.acyclic hydrocarbons - ANSWER ✔ molecules consisting of open chains of
carbon atoms
29.aromatic hydrocarbons - ANSWER ✔ Polygonal Unsaturated hydrocarbon
rings that contain double bonds throughout and have a scent. They are the
bases of steroids.
30.Benzene - ANSWER ✔ Consists of a ring of six carbon atoms with
alternating single and double carbon-carbon bonds. Is a common solvent.
31.naphthalene - ANSWER ✔ Bicyclic structure containing 2 carbon rings.
Looks like 2 benzenes joined together.
32.Phenol - ANSWER ✔ Benzene ring with -OH
33.Petroleum - ANSWER ✔ Primary source of hydrocarbons. Found in natural
gas and crude oil.
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. How many nonbonding electron pairs (lone pairs) are present in H-Br? -
ANSWER ✔ 3
2. How many bonding electron pairs are present in N? - ANSWER ✔ 3
3. How many bonds does nitrogen typically form? - ANSWER ✔ Three
4. Which of the following statements contrasting covalent bonds and ionic
bonds is correct? - ANSWER ✔ Covalent bonds usually involve two
nonmetals and ionic bonds usually involve a metal and nonmetal
5. Which atom in chlorous acid (HCLO2) are involved in a coordinate covalent
bond? - ANSWER ✔ Oxygen and chlorine
6. How many valence electrons are in the lewis structure for C2H3O2? -
ANSWER ✔ 24
,7. What is the VSEPR theory based on? - ANSWER ✔ Electrons pairs in the
valence shell of an atom adopt an arrangement in space that minimizes the
repulsions between the like-charged electron pairs
8. If the central atom in a molecule has four electron groups, it is
____________ and has bond angles of ____________. - ANSWER ✔
Tetrahedral; 109 degrees
9. How many electron groups does the central atom in CO2 contain? -
ANSWER ✔ Two
10.in atoms, electrons will occupy the lowest energy orbitals available -
ANSWER ✔ aufbau principle
11.the assignment of all of the electrons in an atom into specific shells and
subshells - ANSWER ✔ electron configuration
12.how many electrons can an s subshell hold - ANSWER ✔ 2
13.how many electrons can a p subshell hold - ANSWER ✔ 6
14.how many electrons can a d subshell hold - ANSWER ✔ 10
15.how many electrons can each orbital in an electron configuration hold -
ANSWER ✔ 2
,16.two electrons in the same orbital cannot have the same spin - ANSWER ✔
pauli exclusion principle
17.filling orbitals - ANSWER ✔ 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f,
5d, 6p, 7s, 5f, 6d, 7p
18.Anomalies in Configurations - ANSWER ✔ Chromium, copper do not
follow pattern
19.Isoelectronic - ANSWER ✔ describes atoms/ions having identical electron
configurations:
20.Atomic radius Trends - ANSWER ✔ •Increase going down a column
•As atomic number increases, so does the number of valence electrons. More
electrons mean more electron-electron repulsion, which increases the size of
the atom.
•
•Decrease going across a row
•Increased effective nuclear charge (Zeff) moving across row
•Increased attraction for valence electrons → decreased atomic size
21.Octet Rule - ANSWER ✔ Atoms tend to lose, gain, or share electrons to
obtain a set of eight valence electrons
22.What are Alkanes - ANSWER ✔ a hydrocarbon containing only single
covalent bonds
23.What are Alkenes - ANSWER ✔ Hydrocarbons with one or more carbon-
carbon double bonds
, 24.What are alkynes? - ANSWER ✔ Hydrocarbons with triple bonds
25.Saturated - ANSWER ✔ single bonds only
26.Unsaturated - ANSWER ✔ double bonds and triple bonds
27.cyclic hydrocarbons - ANSWER ✔ compounds that contain a hydrocarbon
ring. starts with prefix cyclo-
28.acyclic hydrocarbons - ANSWER ✔ molecules consisting of open chains of
carbon atoms
29.aromatic hydrocarbons - ANSWER ✔ Polygonal Unsaturated hydrocarbon
rings that contain double bonds throughout and have a scent. They are the
bases of steroids.
30.Benzene - ANSWER ✔ Consists of a ring of six carbon atoms with
alternating single and double carbon-carbon bonds. Is a common solvent.
31.naphthalene - ANSWER ✔ Bicyclic structure containing 2 carbon rings.
Looks like 2 benzenes joined together.
32.Phenol - ANSWER ✔ Benzene ring with -OH
33.Petroleum - ANSWER ✔ Primary source of hydrocarbons. Found in natural
gas and crude oil.
