CHM 130 Fundamental Chemistry Final
Exam ACTUAL UPDATED QUESTIONS
AND CORRECT ANSWERS
Law of Conservation of Mass: - CORRECT ANSWERS✅✅there is no change in the total
mass of the substances reacting in a balanced chemical reaction; thus, no material is lost or
gained as original substances are changed to new substances
Theoretical Yield: - CORRECT ANSWERS✅✅amount of product (100%) we would expect
if all the reactants were converted to the desired product
Actual Yield: - CORRECT ANSWERS✅✅the measure of mass of the product when a
reaction ends
Percent Yield: - CORRECT ANSWERS✅✅(actual yield/theoretical yield) x 100%
The maximum number of electrons that may occupy the third energy level is... - CORRECT
ANSWERS✅✅18
What shape is the s sublevel? - CORRECT ANSWERS✅✅spherical
Wavelength (lambda): - CORRECT ANSWERS✅✅the distance from a crest or trough in
the wave to the next trough or crest in the wave
Frequency (fancy lookin v): - CORRECT ANSWERS✅✅number of times the crests of a
wave pass a point in 1s
v = c (speed of light)/lambda
lambda = c/v
c = lambda(v) - CORRECT ANSWERS✅✅
, Electromagnetic spectrum: - CORRECT ANSWERS✅✅an arrangement of different types
of electromagnetic radiation fro the longest wavelength to shortest wavelength or from lowest
energy to highest energy
An electron can change from one energy level to a higher energy level only if it... -
CORRECT ANSWERS✅✅absorbs the equal energy to the difference in energy levels
When an electron drops to a lower energy level, how is energy lost? - CORRECT
ANSWERS✅✅energy, equal to the difference in energy levels, is emitted as a photon
When 2 electrons are in the same orbital, they will... - CORRECT ANSWERS✅✅repel each
other unless their magnetic fields cancel--this only happens when the 2 electrons spin in
opposite directions
The total # of electrons in all the sublevels adds up to give... - CORRECT
ANSWERS✅✅the electrons allowed in an energy level
What does an orbital diagram show you? - CORRECT ANSWERS✅✅The placement of the
electrons in the orbitals in order of increasing energy
The group numbers indicate the number of... - CORRECT ANSWERS✅✅valence electrons
for the elements in each of vertical column
The atomic size of an atom is determined by the distance of... - CORRECT
ANSWERS✅✅valence electrons from the nucleus
For elements going across a period, the number of protons in the nucleus.... - CORRECT
ANSWERS✅✅increases the (+) charge of the nucleus; as a result the electrons are pulled
closer to the nucleus, which means that the atomic size of elements decreases going L to R
across a period
Ionization energy: - CORRECT ANSWERS✅✅the energy needed to remove one electron
from an atom in the gaseous state
Exam ACTUAL UPDATED QUESTIONS
AND CORRECT ANSWERS
Law of Conservation of Mass: - CORRECT ANSWERS✅✅there is no change in the total
mass of the substances reacting in a balanced chemical reaction; thus, no material is lost or
gained as original substances are changed to new substances
Theoretical Yield: - CORRECT ANSWERS✅✅amount of product (100%) we would expect
if all the reactants were converted to the desired product
Actual Yield: - CORRECT ANSWERS✅✅the measure of mass of the product when a
reaction ends
Percent Yield: - CORRECT ANSWERS✅✅(actual yield/theoretical yield) x 100%
The maximum number of electrons that may occupy the third energy level is... - CORRECT
ANSWERS✅✅18
What shape is the s sublevel? - CORRECT ANSWERS✅✅spherical
Wavelength (lambda): - CORRECT ANSWERS✅✅the distance from a crest or trough in
the wave to the next trough or crest in the wave
Frequency (fancy lookin v): - CORRECT ANSWERS✅✅number of times the crests of a
wave pass a point in 1s
v = c (speed of light)/lambda
lambda = c/v
c = lambda(v) - CORRECT ANSWERS✅✅
, Electromagnetic spectrum: - CORRECT ANSWERS✅✅an arrangement of different types
of electromagnetic radiation fro the longest wavelength to shortest wavelength or from lowest
energy to highest energy
An electron can change from one energy level to a higher energy level only if it... -
CORRECT ANSWERS✅✅absorbs the equal energy to the difference in energy levels
When an electron drops to a lower energy level, how is energy lost? - CORRECT
ANSWERS✅✅energy, equal to the difference in energy levels, is emitted as a photon
When 2 electrons are in the same orbital, they will... - CORRECT ANSWERS✅✅repel each
other unless their magnetic fields cancel--this only happens when the 2 electrons spin in
opposite directions
The total # of electrons in all the sublevels adds up to give... - CORRECT
ANSWERS✅✅the electrons allowed in an energy level
What does an orbital diagram show you? - CORRECT ANSWERS✅✅The placement of the
electrons in the orbitals in order of increasing energy
The group numbers indicate the number of... - CORRECT ANSWERS✅✅valence electrons
for the elements in each of vertical column
The atomic size of an atom is determined by the distance of... - CORRECT
ANSWERS✅✅valence electrons from the nucleus
For elements going across a period, the number of protons in the nucleus.... - CORRECT
ANSWERS✅✅increases the (+) charge of the nucleus; as a result the electrons are pulled
closer to the nucleus, which means that the atomic size of elements decreases going L to R
across a period
Ionization energy: - CORRECT ANSWERS✅✅the energy needed to remove one electron
from an atom in the gaseous state
