CEM 141 Final MSU COMPLETE EXAM
QUESTIONS WITH CORRECT
ANSWERS (VERIFIED SOLUTIONS)
||100% GUARANTEED
PASS||UPDATED 2026/2027
SYLLABUS||ALREADY GRADED||
State Change Plateau - ANSWER ✓ Flat region on heating/cooling curve during
phase change
Thermal Conductivity - ANSWER ✓ Ability to transfer heat
Temperature Gradient - ANSWER ✓ Difference in temperature that drives heat
flow
Work - ANSWER ✓ Energy transfer by force acting through distance
Internal Energy Change - ANSWER ✓ Sum of heat and work exchanged with
surroundings
Quantum Mechanical Model - ANSWER ✓ Model treating electrons as
wavefunctions with quantized energies
Wavefunction (ψ) - ANSWER ✓ Mathematical function describing electron
probability
Probability Density - ANSWER ✓ Likelihood of finding an electron in a region of
space
Radial Node - ANSWER ✓ Spherical region where electron probability is zero
Angular Node - ANSWER ✓ Planes or cones where electron probability is zero
,Subshell - ANSWER ✓ Group of orbitals with same type (s, p, d, f)
Shell - ANSWER ✓ Set of orbitals with same principal quantum number n
Degenerate Orbitals - ANSWER ✓ Orbitals with identical energy
Ground-State Configuration - ANSWER ✓ Lowest-energy arrangement of
electrons
Excited-State Configuration - ANSWER ✓ Arrangement where electrons occupy
higher orbitals
Electron Promotion - ANSWER ✓ Moving electron to higher energy orbital
Transition - ANSWER ✓ Electron moving between energy states by absorbing or
emitting light
Spectral Line - ANSWER ✓ Specific wavelength corresponding to electron
transition
Quantized Orbitals - ANSWER ✓ Energy levels with distinct allowed values
Node Count Rule - ANSWER ✓ n − 1 total nodes in an orbital
Effective Nuclear Charge Trend - ANSWER ✓ Increases across a period;
decreases down a group
London Forces Increase - ANSWER ✓ With more electrons and larger surface
area
Bond Dissociation Energy - ANSWER ✓ Energy needed to break one mole of
bonds
Bond Stability - ANSWER ✓ Increases with bond strength and short bond length
Metallic Luster - ANSWER ✓ Shiny appearance due to electron transitions
,Electrical Conductivity - ANSWER ✓ Ability of electrons to move through
material
Thermal Conductivity - ANSWER ✓ Ability to transfer heat via electron
movement
Electron Sea Model - ANSWER ✓ Describes delocalized electrons in metals
Malleability Cause - ANSWER ✓ Layers of metal atoms can shift without
breaking bonds
Ductility Cause - ANSWER ✓ Delocalized electrons allow stretching of metal
Ionic Bond - ANSWER ✓ Electrostatic attraction between cations and anions
Ionic Lattice - ANSWER ✓ Ordered structure of ions held by electrostatic forces
Lattice Energy - ANSWER ✓ Energy released when ionic lattice forms
Network Covalent Solid - ANSWER ✓ Strong 3D structure from covalent bonds
(diamond, quartz)
Molecular Solid IMF - ANSWER ✓ Determines melting/boiling points of
molecular substances
Atomic Solid - ANSWER ✓ Solid composed of individual atoms (e
g - ANSWER ✓
, noble gases in solid form) - ANSWER ✓
Sublimation - ANSWER ✓ Solid transitions directly to gas
Deposition - ANSWER ✓ Gas transitions directly to solid
, Bonding Capacity (Valency) - ANSWER ✓ Typical number of bonds an atom
forms
Triple Bond - ANSWER ✓ One sigma bond and two pi bonds
Double Bond - ANSWER ✓ One sigma bond and one pi bond
Single Bond - ANSWER ✓ One sigma bond
Bond Order Formula - ANSWER ✓ (Bonding electrons - antibonding electrons)/2
Formal Charge Minimization - ANSWER ✓ Preferred Lewis structures have
smallest formal charges
Electronegative Atom Position - ANSWER ✓ More electronegative atoms usually
avoid positive charges
Resonance Stability - ANSWER ✓ Delocalization lowers energy
Average Bond Order - ANSWER ✓ Fractional bond order resulting from
resonance
Octet Expanded - ANSWER ✓ Atoms in period 3 or higher can exceed 8 electrons
Octet Deficient - ANSWER ✓ Atoms like B and Be often form fewer than 8
electrons
Best Lewis Structure - ANSWER ✓ Minimizes formal charges and obeys octet
when possible
Bent Geometry (2 bonds, 1 lone pair) - ANSWER ✓ ~120° in trigonal planar
environment
Bent Geometry (2 bonds, 2 lone pairs) - ANSWER ✓ ~104
5° in tetrahedral environment - ANSWER ✓
QUESTIONS WITH CORRECT
ANSWERS (VERIFIED SOLUTIONS)
||100% GUARANTEED
PASS||UPDATED 2026/2027
SYLLABUS||ALREADY GRADED||
State Change Plateau - ANSWER ✓ Flat region on heating/cooling curve during
phase change
Thermal Conductivity - ANSWER ✓ Ability to transfer heat
Temperature Gradient - ANSWER ✓ Difference in temperature that drives heat
flow
Work - ANSWER ✓ Energy transfer by force acting through distance
Internal Energy Change - ANSWER ✓ Sum of heat and work exchanged with
surroundings
Quantum Mechanical Model - ANSWER ✓ Model treating electrons as
wavefunctions with quantized energies
Wavefunction (ψ) - ANSWER ✓ Mathematical function describing electron
probability
Probability Density - ANSWER ✓ Likelihood of finding an electron in a region of
space
Radial Node - ANSWER ✓ Spherical region where electron probability is zero
Angular Node - ANSWER ✓ Planes or cones where electron probability is zero
,Subshell - ANSWER ✓ Group of orbitals with same type (s, p, d, f)
Shell - ANSWER ✓ Set of orbitals with same principal quantum number n
Degenerate Orbitals - ANSWER ✓ Orbitals with identical energy
Ground-State Configuration - ANSWER ✓ Lowest-energy arrangement of
electrons
Excited-State Configuration - ANSWER ✓ Arrangement where electrons occupy
higher orbitals
Electron Promotion - ANSWER ✓ Moving electron to higher energy orbital
Transition - ANSWER ✓ Electron moving between energy states by absorbing or
emitting light
Spectral Line - ANSWER ✓ Specific wavelength corresponding to electron
transition
Quantized Orbitals - ANSWER ✓ Energy levels with distinct allowed values
Node Count Rule - ANSWER ✓ n − 1 total nodes in an orbital
Effective Nuclear Charge Trend - ANSWER ✓ Increases across a period;
decreases down a group
London Forces Increase - ANSWER ✓ With more electrons and larger surface
area
Bond Dissociation Energy - ANSWER ✓ Energy needed to break one mole of
bonds
Bond Stability - ANSWER ✓ Increases with bond strength and short bond length
Metallic Luster - ANSWER ✓ Shiny appearance due to electron transitions
,Electrical Conductivity - ANSWER ✓ Ability of electrons to move through
material
Thermal Conductivity - ANSWER ✓ Ability to transfer heat via electron
movement
Electron Sea Model - ANSWER ✓ Describes delocalized electrons in metals
Malleability Cause - ANSWER ✓ Layers of metal atoms can shift without
breaking bonds
Ductility Cause - ANSWER ✓ Delocalized electrons allow stretching of metal
Ionic Bond - ANSWER ✓ Electrostatic attraction between cations and anions
Ionic Lattice - ANSWER ✓ Ordered structure of ions held by electrostatic forces
Lattice Energy - ANSWER ✓ Energy released when ionic lattice forms
Network Covalent Solid - ANSWER ✓ Strong 3D structure from covalent bonds
(diamond, quartz)
Molecular Solid IMF - ANSWER ✓ Determines melting/boiling points of
molecular substances
Atomic Solid - ANSWER ✓ Solid composed of individual atoms (e
g - ANSWER ✓
, noble gases in solid form) - ANSWER ✓
Sublimation - ANSWER ✓ Solid transitions directly to gas
Deposition - ANSWER ✓ Gas transitions directly to solid
, Bonding Capacity (Valency) - ANSWER ✓ Typical number of bonds an atom
forms
Triple Bond - ANSWER ✓ One sigma bond and two pi bonds
Double Bond - ANSWER ✓ One sigma bond and one pi bond
Single Bond - ANSWER ✓ One sigma bond
Bond Order Formula - ANSWER ✓ (Bonding electrons - antibonding electrons)/2
Formal Charge Minimization - ANSWER ✓ Preferred Lewis structures have
smallest formal charges
Electronegative Atom Position - ANSWER ✓ More electronegative atoms usually
avoid positive charges
Resonance Stability - ANSWER ✓ Delocalization lowers energy
Average Bond Order - ANSWER ✓ Fractional bond order resulting from
resonance
Octet Expanded - ANSWER ✓ Atoms in period 3 or higher can exceed 8 electrons
Octet Deficient - ANSWER ✓ Atoms like B and Be often form fewer than 8
electrons
Best Lewis Structure - ANSWER ✓ Minimizes formal charges and obeys octet
when possible
Bent Geometry (2 bonds, 1 lone pair) - ANSWER ✓ ~120° in trigonal planar
environment
Bent Geometry (2 bonds, 2 lone pairs) - ANSWER ✓ ~104
5° in tetrahedral environment - ANSWER ✓
