CHEM 1205 FINAL EXAM QUESTIONS AND CORRECT ANSWERS
|2026/2027 UPDATED |GUARANTEED PASS.
How do you name polyatomic ions? - Answer -- You do not need to specify the charge unless the
cation in a transition metal
- You do not need to specify how many ions are needed to balance the charges.
Calcium carbonate
Magnesium hydroxide
Iron (II) sulfate
How do you name covalent compounds? - Answer -- Name the first nonmetal by its element
name and the second with -ide
- Add prefixes tri- di-
nitrogen dioxide
dinotrogen tetraoxide
What does VSEPR stand for? - Answer -Valence Shell Electron Pair Repulsion
What does the VSEPR theory state? - Answer -Repulsion between the sets of valence-level
electrons surrounding an atom causes these sets to be oriented as far apart as possible
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,Explain what linear shapes look like? - Answer -Any atom surrounded by two groups is linear
and has a bond angle of 180.
What does a trigonal planar look like? - Answer -An atom surrounded by three groups and has a
bond angle of 120.
What does tetrahedral look like? - Answer -An atom surrounded by four groups and has a bond
angle of 109.5
What does trigonal pyramidal look like? - Answer -An atom surrounded by three groups and the
central atoms contains a lone pair with a bond angle of 107
What does bent look like? - Answer -Central atom has two lone pairs and two bonds with a
bond angle of 105
What is electronegativity? - Answer -Measure of an atom's attraction for electrons
What trend does electronegativity follow on the periodic table? - Answer -Increasing
electronegativity to the right
Increasing electronegativity as it goes up
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, How does electronegativity effect polarity? - Answer -If the electronegativities of two bonded
atoms are equal or similar the bond is non polar
Bonding between atoms with different electronegativities gives a polar covalent bond or dipole
What does the classification of a molecule as polar or nonpolar depend on? - Answer -- The
polarity or individual bonds
- The overall shape of the molecule
If a molecule is trigonal planar with one polar bond will it be polar or nonpolar? - Answer -Polar
If a molecule is trigonal planar with three polar bonds will it be polar or nonpolar? - Answer -
Nonpolar
If a molecule is trigonal pyramidal with three polar bonds will it be polar or nonpolar? - Answer
-Polar
What is kinetic energy? - Answer -The energy of motion
What is potential energy? - Answer -Th energy an object has because of its position or stored
energy
3|Page
|2026/2027 UPDATED |GUARANTEED PASS.
How do you name polyatomic ions? - Answer -- You do not need to specify the charge unless the
cation in a transition metal
- You do not need to specify how many ions are needed to balance the charges.
Calcium carbonate
Magnesium hydroxide
Iron (II) sulfate
How do you name covalent compounds? - Answer -- Name the first nonmetal by its element
name and the second with -ide
- Add prefixes tri- di-
nitrogen dioxide
dinotrogen tetraoxide
What does VSEPR stand for? - Answer -Valence Shell Electron Pair Repulsion
What does the VSEPR theory state? - Answer -Repulsion between the sets of valence-level
electrons surrounding an atom causes these sets to be oriented as far apart as possible
1|Page
,Explain what linear shapes look like? - Answer -Any atom surrounded by two groups is linear
and has a bond angle of 180.
What does a trigonal planar look like? - Answer -An atom surrounded by three groups and has a
bond angle of 120.
What does tetrahedral look like? - Answer -An atom surrounded by four groups and has a bond
angle of 109.5
What does trigonal pyramidal look like? - Answer -An atom surrounded by three groups and the
central atoms contains a lone pair with a bond angle of 107
What does bent look like? - Answer -Central atom has two lone pairs and two bonds with a
bond angle of 105
What is electronegativity? - Answer -Measure of an atom's attraction for electrons
What trend does electronegativity follow on the periodic table? - Answer -Increasing
electronegativity to the right
Increasing electronegativity as it goes up
2|Page
, How does electronegativity effect polarity? - Answer -If the electronegativities of two bonded
atoms are equal or similar the bond is non polar
Bonding between atoms with different electronegativities gives a polar covalent bond or dipole
What does the classification of a molecule as polar or nonpolar depend on? - Answer -- The
polarity or individual bonds
- The overall shape of the molecule
If a molecule is trigonal planar with one polar bond will it be polar or nonpolar? - Answer -Polar
If a molecule is trigonal planar with three polar bonds will it be polar or nonpolar? - Answer -
Nonpolar
If a molecule is trigonal pyramidal with three polar bonds will it be polar or nonpolar? - Answer
-Polar
What is kinetic energy? - Answer -The energy of motion
What is potential energy? - Answer -Th energy an object has because of its position or stored
energy
3|Page
