CHEM 162 EXAM 1 QUESTIONS WITH
CORRECT ANSWERS
Relationship between photon energy, frequency, and wavelength - Correct Answers -
Photon energy increases as the photons frequency increases and wavelength
decreases
An atom absorbs a photon - Correct Answers -The absorbed energy becomes part of an
electron and the electron moves to a higher potential energy position
Atomic spectrum - Correct Answers -Each emission line in an atomic spectrum is a
specific energy admitted when an electron goes from a higher potential energy to a
position that is lower in potential energy
Light emitted by a hot solid at different temperatures - Correct Answers -For a hot solid,
each wavelength of light is a specific energy emitted when an atom goes from a higher
vibrational energy to a lower vibrational energy
Bohr Postulates - Correct Answers --an electron can only go between certain potential
energy levels
-an electrons average distance from the nucleus is specific
-electrons move about the nucleus in a circular pattern
-an electron can only have a specific potential energy
diamagnetic substance - Correct Answers -having the same amount of e- spinning in
both electrons (not attracted to magnet)
Hund's Rule gives ground state of e- - Correct Answers -put electrons into separate
orbitals of the same PE (same subshell) with the same spin before pairing electrons
size of an atomic radius - Correct Answers -increases down a family and decreases as
you go left to right across a period (opposite for ionization energy)
If an electron completely leaves the nucleus of an atom - Correct Answers -The highest
potential energy this electron can have is 0
When a single electron atom absorbs enough energy to completely leave the cation -
Correct Answers -The electron would be in the n=infinity energy level and its PE=0
Wavelength - Correct Answers -Distance between peaks
, Frequency/Hertz (Hz) - Correct Answers -Rate how many cycles per second
(1/seconds, 1s1-)
photons - Correct Answers -move at the same velocity in 1-D
a wave - Correct Answers -is characterized by its wavelength and frequency (higher
frequency... higher 2-D velocity... shorter wavelength)
Speed of light in a vacuum (c=vy) - Correct Answers -2.998x10^8 m/s
For photons - Correct Answers -as frequency increases and wavelength decreases
energy per photon increases
as frequency decreases and wavelength increases energy per photon decreases
white light is - Correct Answers -the whole rainbow of colors
a substance is blue - Correct Answers -because it does not absorb the blue color
(atoms of a given element absorb only certain wavelength of light) (blue photons make it
through the other visible photons are taken away "absorbed")
Beers Law - Correct Answers -absorption is proportional to concentration (ab constants)
no visible photons - Correct Answers -black (absorbs all visible photons)
Atoms can be identified by the light they emit because atoms of a given element only
emit certain wavelengths of photons - Correct Answers -the pattern of wavelengths
formed by a single element is referred to as the elements atomic spectrum
electron gained some energy and moves to a position that is higher in PE - Correct
Answers -if not enough energy for electron to escape nucleus e- will exit same total
energy it absorbs
atomic spectrum - Correct Answers -specific energy emitted when an electron goes
from a PE level to a PE level that is lower in energy
Plank's constant h - Correct Answers -6.626 x 10^-34 (he proposed that an atom could
have only certain energies of vibration E=hv)
photoelectric effect - Correct Answers -The emission of electrons from a metal when
light shines on the metal
wave-particle duality of light - Correct Answers -Sometimes light appears to behave like
a wave, at other times like a particle.
Bohr's Postulates - Correct Answers -theory only works for any one electron atoms
(calculates PE in electron)
CORRECT ANSWERS
Relationship between photon energy, frequency, and wavelength - Correct Answers -
Photon energy increases as the photons frequency increases and wavelength
decreases
An atom absorbs a photon - Correct Answers -The absorbed energy becomes part of an
electron and the electron moves to a higher potential energy position
Atomic spectrum - Correct Answers -Each emission line in an atomic spectrum is a
specific energy admitted when an electron goes from a higher potential energy to a
position that is lower in potential energy
Light emitted by a hot solid at different temperatures - Correct Answers -For a hot solid,
each wavelength of light is a specific energy emitted when an atom goes from a higher
vibrational energy to a lower vibrational energy
Bohr Postulates - Correct Answers --an electron can only go between certain potential
energy levels
-an electrons average distance from the nucleus is specific
-electrons move about the nucleus in a circular pattern
-an electron can only have a specific potential energy
diamagnetic substance - Correct Answers -having the same amount of e- spinning in
both electrons (not attracted to magnet)
Hund's Rule gives ground state of e- - Correct Answers -put electrons into separate
orbitals of the same PE (same subshell) with the same spin before pairing electrons
size of an atomic radius - Correct Answers -increases down a family and decreases as
you go left to right across a period (opposite for ionization energy)
If an electron completely leaves the nucleus of an atom - Correct Answers -The highest
potential energy this electron can have is 0
When a single electron atom absorbs enough energy to completely leave the cation -
Correct Answers -The electron would be in the n=infinity energy level and its PE=0
Wavelength - Correct Answers -Distance between peaks
, Frequency/Hertz (Hz) - Correct Answers -Rate how many cycles per second
(1/seconds, 1s1-)
photons - Correct Answers -move at the same velocity in 1-D
a wave - Correct Answers -is characterized by its wavelength and frequency (higher
frequency... higher 2-D velocity... shorter wavelength)
Speed of light in a vacuum (c=vy) - Correct Answers -2.998x10^8 m/s
For photons - Correct Answers -as frequency increases and wavelength decreases
energy per photon increases
as frequency decreases and wavelength increases energy per photon decreases
white light is - Correct Answers -the whole rainbow of colors
a substance is blue - Correct Answers -because it does not absorb the blue color
(atoms of a given element absorb only certain wavelength of light) (blue photons make it
through the other visible photons are taken away "absorbed")
Beers Law - Correct Answers -absorption is proportional to concentration (ab constants)
no visible photons - Correct Answers -black (absorbs all visible photons)
Atoms can be identified by the light they emit because atoms of a given element only
emit certain wavelengths of photons - Correct Answers -the pattern of wavelengths
formed by a single element is referred to as the elements atomic spectrum
electron gained some energy and moves to a position that is higher in PE - Correct
Answers -if not enough energy for electron to escape nucleus e- will exit same total
energy it absorbs
atomic spectrum - Correct Answers -specific energy emitted when an electron goes
from a PE level to a PE level that is lower in energy
Plank's constant h - Correct Answers -6.626 x 10^-34 (he proposed that an atom could
have only certain energies of vibration E=hv)
photoelectric effect - Correct Answers -The emission of electrons from a metal when
light shines on the metal
wave-particle duality of light - Correct Answers -Sometimes light appears to behave like
a wave, at other times like a particle.
Bohr's Postulates - Correct Answers -theory only works for any one electron atoms
(calculates PE in electron)
