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WorksheetsMid Modern Review
Total questions: 53
Worksheet time: 34mins
Name
Class
Date
1.
Is light a wave or a particle
a)
wave
b)
particle
c)
yes
d)
neither
2.
Which has more energy in its photons, a very bright, powerful red laser or a small key-ring red laser?
a)
powerful red laser
b)
key-ring laser
c)
cat
d)
neither
3.
Which has more energy in its photons, a red laser or a green laser?
a)
red laser
b)
green laser
c)
both
d)
neither
4.
What is a packet of light called?
a)
quanta
b)
photon
c)
particle
5.
An electron-volt is a unit of
a)
charge
b)
voltage
c)
energy
d)
frequency
6.
The value of 1 electron-volt is
a)
1.8e^-19J
b)
1.9e^-19
c)
1.6e^-19
d)
2.1e^-19
7.
An electron volt is
a)
the charge of one electron
b)
the energy of one electron
c)
an amount of energy much smaller than a joule
d)
the amount of energy much larger than a joule
8.
Consider an atom of gold in which the nucleus contains 79 protons and 118 neutrons. What is its atomic number and atomic weight?
a)
The atomic number is 79, and the atomic weight is 197.
b)
The atomic number is 79, and the atomic weight is 118.
c)
The atomic number is 118, and the atomic weight is 197.
d)
The atomic number is 118, and the atomic weight is 79.
9.
Each of the following describes an "Atom 1" and an "Atom 2." In which case are the two atoms isotopes of each other?
a)
Atom 1: nucleus with 6 protons and 8 neutrons, surrounded by 6 electrons Atom 2: nucleus with 7 protons and 8 neutrons, surrounded by 7 electrons
b)
Atom 1: nucleus with 8 protons and 8 neutrons, surrounded by 8 electrons Atom 2: nucleus with 8 protons and 8 neutrons, surrounded by 7 electrons
c)
Atom 1: nucleus with 92 protons and 143 neutrons, surrounded by 92 electrons Atom 2: nucleus with 92 protons and 146 neutrons, surrounded by 92 electrons
d)
Atom 1: nucleus with 1 proton and 0 neutrons, surrounded by 1 electron Atom 2: nucleus with 2 protons and 2 neutrons, surrounded by 2 electrons
10.
When an atom absorbs a photon containing energy, any of the following can happen except which?
a)
The atom becomes excited.
b)
The atom is ionized.
c)
An electron moves from an upper energy level to a lower one.
d)
An electron moves from a lower energy level to an upper one.
11.
How can an electron in an atom lose energy to go from a higher energy level to a lower energy level?
a)
It loses kinetic energy.
b)
It releases a photon equal in energy to its own energy drop.
c)
It absorbs a photon equal in energy to its own energy drop.
d)
It loses gravitational potential energy.
12.
When an electron in an atom goes from a higher energy state to a lower energy state, the atom
a)
emits a photon of a specific frequency.
b)
absorbs a photon of a specific frequency.
c)
absorbs several photons of a specific frequency.
d)
can emit a photon of any frequency.
13.
The shorter the wavelength of light, the higher its frequency
a)
true
b)
false
14.
The greater the wavelength of light, the greater its energy.
a)
true
b)
false
15.
X rays are always more intense than radio waves.
a)
true
b)
false
16.
You are currently emitting electromagnetic waves
a)
true
b)
false
17.
The atomic nuclei of the same element always have the same number of protons.
a)
true
b)
false
18.
The atomic nuclei of the same element always have the same number of neutrons.
a)
true
b)
false
19.
The energy levels for electrons vary from one element to another.
a)
true
b)
false
20.
Which transition represents an electron that absorbs a photon with 10.2 eV of energy?
a)
A
b)
B
c)
E
d)
D
21.
Which transition represents an electron that absorbs a photon with 10.2 eV of energy?
a)
A
b)
B
c)
C
d)
D
22.
Which transition represents the electron that emits a photon with the highest energy?
a)
A
b)
B
c)
C
d)
D
23.
Which transition represents an electron that is breaking free of the atom?
a)
B
b)
C
c)
D
d)
E
24.
Which transition, as shown, is not possible?
a)
A
b)
B
c)
C
d)
D
25.
Suppose you look at a spectrum of visible light by looking through a prism or diffraction grating. How can you decide whether it is an emission line spectrum or an absorption line spectrum?
a)
An emission line spectrum consists of bright lines on a dark background, while an absorption line spectrum consists of dark lines on a rainbow background.
b)
An emission line spectrum consists of a long bright line, while an absorption line spectrum consists of a long dark line.
c)
The only way to decide is to make a graph of the intensity of the light at every wavelength, and then analyze the graph carefully.
d)
The emission line spectrum is produced by electrons jumping up in energy level, while the absorption line spectrum is produced by electrons jumping down in energy level.
26.
The maximum kinetic energy of electrons emitted through the photoelectric effect increases with increase in frequency.
a)
true
b)
false
27.
The number of electrons emitted per second from a given metal is directly proportional to intensity.
a)
true
b)
false
28.
The photoelectric effect best demonstrates the
a)
wave nature of light
b)
particle nature of light
c)
both
d)
none of the above
29.
How is the threshold frequency represented on a KE vs f graph?
a)
x-intercept
b)
y-intercept
c)
slope
d)
area under the curve
30.
How is the work function represented on a KE vs f graph?
a)
x-intercept
b)
y-intercept
c)
slope
d)
area under the curve
31.
How is the planks constant represented on a KE vs f graph?
a)
x-intercept
b)
y-intercept
c)
slope
d)
area under the curve
32.
The wavelength of a particle is called the
a)
particle wavelength
b)
particle size
c)
de Broglie wavelength
d)
photoelectric wavelength
33.
Energy states available to electrons are
a)
continuous
b)
quantized
34.
What is threshold frequency?
a)
the minimum frequency required to ionize and electron
b)
the minimum energy to ionize an electron
c)
the minimum voltage required to stop the flow of electrons
35.
What is work function?
a)
the minimum frequency required to ionize and electron
b)
the minimum energy to ionize an electron
c)
the minimum voltage required to stop the flow of electrons
36.
What is stopping voltage?
a)
the minimum frequency required to ionize and electron
b)
the minimum energy to ionize an electron
c)
the minimum voltage required to stop the flow of electrons
37.
How can you determine the energy of a photon
a)
E=hf
b)
E=hf-(phi)
c)
(lambda)=h/p
d)
E=mc^2
38.
How can you determine the momentum of a photon
a)
E=hf
b)
E=hf-(phi)
c)
(lambda)=h/p
d)
E=mc^2
39.
How can you determine the apparent mass of a photon
a)
E=hf
b)
E=hf-(phi)
c)
(lambda)=h/p
d)
E=mc^2
40.
Which nature of electrons does the Davisson-Germer experiment demonstrate
a)
particle
b)
wave
c)
neither
d)
both
41.
Which nature of photons does the UV catastrophe demonstrate
a)
particle
b)
wave
c)
neither
d)
both
42.
Above which atomic number are elements on the periodic table radioactive
a)
1
b)
2
c)
82
d)
100
43.
Where is the atomic number represented?
a)
top number
b)
bottom number
c)
top number- bottom number
d)
letters
44.
Where is the mass number represented?
a)
top number
b)
bottom number
c)
top number- bottom number
d)
letters
45.
Where is the number of neutrons represented?
a)
top number
b)
bottom number
c)
top number- bottom number
d)
letters
46.
In which type of atoms does alpha decay occur?
a)
atoms that are too large
b)
atoms with too many p
c)
atoms with too many n
d)
atoms with too much energy
47.
In which type of atoms does beta decay occur?
a)
atoms that are too large
b)
atoms with too many p
c)
atoms with too many n
d)
atoms with too much energy
48.
In which type of atoms does beta plus decay occur?
a)
atoms that are too large
b)
atoms with too many p
c)
atoms with too many n
d)
atoms with too much energy
49.
In which type of atoms does gamma decay occur?
a)
atoms that are too large
b)
atoms with too many p
c)
atoms with too many n
d)
atoms with too much energy
50.
What is fusion?
a)
the combination of atoms
b)
the splitting of a single atom
c)
the production of a particle and its' anti-particle
d)
the annihilation of a particle and its' anti-particle
51.
What is fission?
a)
the combination of atoms
b)
the splitting of a single atom
c)
the production of a particle and its' anti-particle
d)
the annihilation of a particle and its' anti-particle
52.
What is pair-production?
a)
the combination of atoms
b)
the splitting of a single atom
c)
the production of a particle and its' anti-particle
d)
the annihilation of a particle and its' anti-particle
53.
What is pair-annihilation?
a)
the combination of atoms
b)
the splitting of a single atom
c)
the production of a particle and its' anti-particle
d)
the annihilation of a particle and its' anti-particle
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