Chem 104 UW Madison Exam 1| (ACTUAL) LATEST 2026 EXPERT CERTIFIED QUESTIONS AND ANSWERS I [GRADED A+]
The electron region geometries will be ___ (the same/different) as the molecular geometries when there are no lone pairs of electrons around
the central atom, but they will be ___ (the same/different) when there are lone pairs present on the central atom. ✔️the same
different
List the order of sizes from largest to smallest, regarding lone pairs and bonds. ✔️lone pair > triple bond > double bond > single bond
Lone pairs occupy ___ (more/less) space than single bonds. ✔️more
Double bonds occupy ___ (more/less) space than triple bonds. ✔️less
The force between an ion and a polar molecule is called ___. ✔️ion-dipole
The force between two polar molecules is called ___. ✔️dipole-dipole
The force between a polar molecular and a non-polar molecule is called ___. ✔️ion-induced dipole
The force between any two molecules that each have at least one electron is called ___. ✔️London dispersion force
Larger and heavier atoms and molecules exhibit ___ (stronger/weaker) dispersion forces than those found in smaller and lighter atoms and
molecules. ✔️stronger
A molecule that has a charge cloud that is easily distorted is said to be ___ (not very/very) polarizable and will have large dispersion forces; one
with a charge cloud that is difficult to distort is ___ (not very/very) polarizable and will have small dispersion forces. ✔️very
not very
A molecule that has a charge cloud that is easily distorted is said to be very polarizable and will have ___ (small/large) dispersion forces; one
with a charge cloud that is difficult to distort is not very polarizable and will have ___ (small/large) dispersion forces. ✔️large
small
How does surface area influence dispersion forces? ✔️Greater surface area increases contact availability for other molecules, which results in
stronger dispersion forces. In contrast, a more compact shape will have weaker dispersion forces.
What are the 3 most electronegative elements? ✔️fluorine, oxygen, nitrogen
Covalent bonds are ___ (stronger/weaker) than hydrogen bonds. ✔️stronger
Orbitals that overlap extensively form bonds that are ___ (weaker/stronger) than those that have less overlap. ✔️stronger
Between any two atoms, the first bond formed will always be a ___ (σ/π) bond. In any multiple bond, there will be one ___ (σ/π) bond, and the
remaining one or two bonds will be ___ (σ/π) bonds. ✔️σ
σ
π
___ (Hybrid/Unhybridized) orbitals overlap to form σ bonds. ___ (Hybrid/Unhybridized) orbitals overlap to form π bonds. ✔️Hybrid
Unhybridized
The electron region geometries will be ___ (the same/different) as the molecular geometries when there are no lone pairs of electrons around
the central atom, but they will be ___ (the same/different) when there are lone pairs present on the central atom. ✔️the same
different
List the order of sizes from largest to smallest, regarding lone pairs and bonds. ✔️lone pair > triple bond > double bond > single bond
Lone pairs occupy ___ (more/less) space than single bonds. ✔️more
Double bonds occupy ___ (more/less) space than triple bonds. ✔️less
The force between an ion and a polar molecule is called ___. ✔️ion-dipole
The force between two polar molecules is called ___. ✔️dipole-dipole
The force between a polar molecular and a non-polar molecule is called ___. ✔️ion-induced dipole
The force between any two molecules that each have at least one electron is called ___. ✔️London dispersion force
Larger and heavier atoms and molecules exhibit ___ (stronger/weaker) dispersion forces than those found in smaller and lighter atoms and
molecules. ✔️stronger
A molecule that has a charge cloud that is easily distorted is said to be ___ (not very/very) polarizable and will have large dispersion forces; one
with a charge cloud that is difficult to distort is ___ (not very/very) polarizable and will have small dispersion forces. ✔️very
not very
A molecule that has a charge cloud that is easily distorted is said to be very polarizable and will have ___ (small/large) dispersion forces; one
with a charge cloud that is difficult to distort is not very polarizable and will have ___ (small/large) dispersion forces. ✔️large
small
How does surface area influence dispersion forces? ✔️Greater surface area increases contact availability for other molecules, which results in
stronger dispersion forces. In contrast, a more compact shape will have weaker dispersion forces.
What are the 3 most electronegative elements? ✔️fluorine, oxygen, nitrogen
Covalent bonds are ___ (stronger/weaker) than hydrogen bonds. ✔️stronger
Orbitals that overlap extensively form bonds that are ___ (weaker/stronger) than those that have less overlap. ✔️stronger
Between any two atoms, the first bond formed will always be a ___ (σ/π) bond. In any multiple bond, there will be one ___ (σ/π) bond, and the
remaining one or two bonds will be ___ (σ/π) bonds. ✔️σ
σ
π
___ (Hybrid/Unhybridized) orbitals overlap to form σ bonds. ___ (Hybrid/Unhybridized) orbitals overlap to form π bonds. ✔️Hybrid
Unhybridized
