WorksheetsUnit 3 Review: Atoms and Light
Total questions: 80
Worksheet time: 1hrs 15mins
Explain how spectral lines of elements are like fingerprints of human beings:
What happens to white light when it passes through a prism?
It splits into the colors it's comprised of
It becomes brighter
It becomes dimmer
It disappears
Why are the color labels in the table in Model 1 plural?
Because there are different shades of each color
Because there are multiple colors mixed together
Because the colors change as light travels
Because it's a grammatical error
Which color corresponds to the longest wavelengths?
Reds
Blues
Violets
Greens
Do all colors of light have the same energy?
Yes
No, violets have the most energy and reds have the least energy
No, reds have the most energy and violets have the least energy
No, all colors have different energy levels
Which color of light corresponds to the shortest wavelength?
Red
Blue
Violet
Green
Which color of light has the most energy?
Red
Blue
Violet
Green
Which color of light has the least energy?
Red
Blue
Violet
Green
Is energy absorbed or released for the electron transition shown in the diagram?
Absorbed
Released
Neither absorbed nor released
Cannot be determined
Is energy absorbed or released for the electron transition shown in the diagram?
Absorbed
Released
Neither absorbed nor released
Cannot be determined
Which element(s) are in the Unknown mixture?
Li
H
He
Na
Which electron transition leads to the highest energy released:
n6 to n2
n5 to n2
n4 to n2
n3 to n2
Which electron transition leads to the lowest energy released:
n6 to n2
n5 to n2
n4 to n2
n3 to n2
Identify an unknown element with a brilliant yellow flame:
lithium
strontium
sodium
copper
potassium
Identify the unknown element using the spectral lines:
beryllium
copper
manganese
strontium
titanium
Violet waves have (a) wavelengths and (b) frequency.
shorter
higher
longer
lower
intermediate
Red waves have (a) wavelengths and (b) frequency.
shorter
higher
longer
lower
intermediate
Radio waves have (a) wavelengths and (b) frequency.
shorter
higher
longer
lower
intermediate
Gamma waves have (a) wavelengths and (b) frequency.
shorter
higher
longer
lower
intermediate
For an electron to move from an energy level close to the nucleus to an energy level far from the nucleus it would need to (a) energy.
gain
lose
For an electron to move from an energy level far from the nucleus to an energy level close to the nucleus it would need to (a) energy.
gain
lose
Are these electrons in the ground state or excited state?
Ground
Excited
Are these electrons in the ground state or excited state?
Ground
Excited
Are these electrons in the ground state or excited state?
Ground
Excited
Are these electrons in the ground state or excited state?
Ground
Excited
Are these electrons in the ground state or excited state?
Ground
Excited
Explain why this atom contains an electron in the excited state:
How many electrons can the first energy level hold?
(a)
How many electrons can the second energy level hold?
(a)
Which energy transition would emit the highest frequency wave:
Which energy transition would emit the lowest frequency wave:
Which energy transition would emit the longest wavelength of light:
Which energy transition would emit the shortest wavelength of light:
Match the following electron transition to the color of light it will produce:
Violet light
Blue-violet light
Blue-green light
Red light
Match the following electron transition to the wavelength of light it will produce:
410 nm
434 nm
486 nm
656 nm
The identity of an element is determined by its: SELECT ALL THAT APPLY
mass number
atomic number
number of neutrons
atomic mass
number of protons
Which statement is true?
the proton and the neutron have opposite charges
the proton and the electron have opposite charges
the electron and the neutron are found in the nucleus
atoms gain or lose protons when they form ions
Protons are found outside the nucleus
Which statement is true?
the proton and the neutron have opposite charges
the number of protons in an element is the same for all neutral atoms of that element
the number of electrons in an element is the same for all neutral atoms of that element
atoms gain or lose protons when they form ions
the number of neutrons in an element is the same for all neutral atoms of that element
Which subatomic particle(s) has/have mass of approximately 1 amu?
Proton
Neutron
Electron
Which subatomic particle has the smallest mass?
Proton
Neutron
Electron
What is the charge of a neutron?
Positive
Negative
Neutral
Which subatomic particle is found in the nucleus of an atom along with protons?
Electron
Neutron
Photon
Which statement is true?
Electrons are positively charged particles
Neutrons have no charge
Protons are negatively charged particles
Atoms lose electrons to form anions
Neutrons are found outside the nucleus
Which statement is true?
Electrons are found in the nucleus
Protons and electrons have the same mass
Neutrons and protons have similar masses
Atoms gain electrons to form cations
Protons are found in the electron cloud
Which statement is true?
Electrons have more mass than protons
Neutrons are negatively charged
Protons are found in the nucleus
Atoms lose neutrons to form ions
Electrons are found in the nucleus
Label the following subatomic particles.
Proton
Neutron
Electron
Positron
The pictured atom is neutral. Identify the atom:
Explain the difference between an atom and an Ion:
Determine which characteristics are associated with each subatomic particle:
Positive charge
Neutral charge
Negative charge
No mass
Same mass as a proton
Same mass as a neutron
Found outside the nucleus
Found inside the nucleus with protons
Found inside the nucleus with neutrons
Determine the number of neutrons:
(a)
Determine the number of electrons:
(a)
Determine the mass number:
(a)
Determine the number of electrons:
(a)
Determine the number of neutrons:
(a)
Is this an atom or an ion:
Ion
Atom
Determine the number of protons:
(a)
Determine the number of neutrons:
(a)
If this is an example of an atom, how many electrons does it have?
(a)
What element is this?
(a)
A wave with a large wavelength will have a ______ frequency and _____ energy
high, low
high, high
low, high
low, low
Ground state means that an electron is...
at its lowest possible potential energy
in the first shell of an atom
laying low for the weekend
removed from an atom
In order to go from ground state to an excited state, an electron must
emit energy
absorb energy
rotate
wiggle
When an electron returns to ground state from an excited state, the atom will
emit energy
absorb energy
rotate
wiggle
increases an energy level
decreases an energy level
increases an energy level
decreases an energy level
If an electron moves from n=4 to n=2 it ____
absorbs energy
releases energy
Reorder the following from lowest energy (1) to highest energy (5).
Infrared
Visible light
Ultraviolet
X-ray
Gamma
Reorder the following from lowest frequency (1) to highest frequency (5).
Radio
Microwave
Infrared
Visible light
Ultraviolet
Electromagnetic waves exhibit properties of waves and particles.
True
False
Which element(s) are in the Unknown mixture?
Li
H
He
Na
Which electron transition leads to the highest energy released:
n6 to n2
n5 to n2
n4 to n2
n3 to n2
Which electron transition leads to the lowest energy released:
n6 to n2
n5 to n2
n4 to n2
n3 to n2
Identify the unknown element using the spectral lines:
beryllium
copper
manganese
strontium
titanium
Violet waves have (a) wavelengths and (b) frequency.
Red waves have (a) wavelengths and (b) frequency.
James is wondering how different colored lights can be produced for “neon” lights. Charles explains that “neon” lights are sometimes neon, but sometimes other elements that give off different colors of light.
How would Charles explain to James how an electron is capable of emitting light? Include these terms: ground state, excited state, absorb(ed), emit(ed), energy level, and electron
