Atomic Structure Multiple Choice HW
PSI Chemistry
Name-------------------------------------------
Wavelength and Frequency
1) What is the frequency, in Hz, of electromagnetic radiation that has a wavelength of 0.55 m?
A) 5.5 x 108
B) 1.8 x 10-9
C) 1.6 x 108
D) 1.3 x 10-33
E) 1.3 x 1033
2) What is the frequency of light, in Hz, that has a wavelength of 1.23 x 10-6 cm?
A) 3.69
B) 2.44 x 1016
C) 4.10 x 10-17
12
-13
D) 9.62 x 10
E) 1.04 x 10
3) What is the wavelength of light (nm) that has a frequency of 3.22 x 10 14 Hz?
A) 932
B) 649
C) 8.66 x 1022
D) 7.32 x 10-7
E) 1.05 x 106
4) What is the wavelength of light (nm) that has a frequency 4.25 x 1014 Hz?
A) 932
B) 706
C)2.39 x 1023
-3
6
D) 1.54 x 10
E) 1.07 x 10
5) The wavelength of a photon that has energy of 5.65 x 10-19 J is __________ m.
A) 3.59 x 10-7
B) 2.64 x 106
C) 2.38 x 1023
D) 4.21 x 10-24
E) 3.79 x 107
6) The energy of a photon that has a wavelength of 10.0 m is __________ J. []
A) 1.99 x 10-26
B) 5.5 x 1025
C) 6.0 x 10-23
9
-25
D) 2.7 x 10
E) 4.5 x 10
7) The energy of a photon that has a frequency of 7.75 x 1014 Hz is __________ J.
A) 8.08 x 10-50
B) 1.99 x 10-25
C) 5.12 x 10-19
D) 1.24 x 1049
E) 1.26 x 10-19
8) What is the frequency (Hz) of a photon that has energy of 4.38 x 10-18 J?
A) 436
B) 6.61 x 1015
C) 1.45 x 10-16
7
-9
D) 2.30 x 10
E) 1.31 x 10
9) Of the following, ______radiation has the longest wavelength and ______ radiation has the greatest energy:
Xray
ultraviolet
visible
A) ultraviolet, Xray
B) visible, ultraviolet
C) Xray, Xray
D) visible, Xray
E) Xray, visible
10) Which one of the following is correct?
A) f + λ = c
B) f / λ = c
D) λ = cf
E) f λ = c
C) f = c λ
11) The photoelectric effect is __________.
A) the total reflection of light by metals giving them their typical luster
B) the production of current by silicon solar cells when exposed to sunlight
C) the ejection of electrons by a metal when struck with light of sufficient energy
D) the darkening of photographic film when exposed to an electric field
E) a relativistic effect
12) The wavelength of light emitted from a traffic light having a frequency of6.15 x1014 Hz is _________.
A) 702 nm
B) 641 nm
C) 674 nm
D) 487 nm
E) 583 nm
13) A radio station broadcasts at 101.5 MHz. The wavelength of the signal is __________ m. []
A) 3.10
B) 2.96
C) 4.71
D) 2.75
E) 3.84
14) The de Broglie wavelength of a12.0 gram bullet traveling at the speed of sound is _________ m. The speed
of sound is 331 m/sec.
A) 2.7 x10-34
B) 1.67 x10-34
C) 3.35 x10-33
-37
-31
D) 2.7 x10
E) 6.6 x10
15) The de Broglie wavelength of a __________ will have the shortest wavelength when traveling at 30 m/s.
A) marble
B) car
C) earth
D) uranium atom
E) hydrogen atom
16) Electromagnetic radiation with a wavelength of ---- nm appears as green light to the human eye. The
frequency of this light is 5.71 x1014 Hz.
A) 525
B) 425
C) 650
D) 1550
E) 571
17) An FM radio station broadcasts electromagnetic radiation at a frequency of 99.5 MHz. The wavelength of this
radiation is __________ m. []
A) 3.01 x106
B) 3.01
C) 3.018 x1016
10
D) 3.018 x10
E) 0.302
18) Electromagnetic radiation with a wavelength of 525 nm appears as green light to the human eye. The energy
of one photon of this light is __________ J. []
A) 1.04 x10-31
B) 3.79 x10-28
C) 3.78 x10-19
-22
18
D) 1.04 x10
E) 2.64 x10
19) Electromagnetic radiation with a wavelength of 531 nm appears as green light to the human eye. The energy
of one photon of this light is 3.74 x10-19 J. Thus, a laser that emits 2.3 x10-2 J of energy in a pulse of light at
this wavelength produces __________ photons in each pulse. []
A) 6.9 x10-17
B) 6.2 x10-24
C) 6.8 x1019
16
13
D) 6.15 x10
E) 6.5 x10
20) The de Broglie wavelength of an electron with a velocity of 6.00 x106 m/s is __________ m. The mass of the
electron is 9.11 x10-31 kg.
A) 8.25 x109
B) 8.25 x1012
C) 1.21 x10-16
D) 1.21 x10-13
E) 1.21 x10-10
Atomic Models
21) Which statement below correctly describes the responses of alpha, beta, and gamma radiation to an electric
field?
A) Both beta and gamma are deflected in the same direction, while alpha shows no response.
B) Both alpha and gamma are deflected in the same direction, while beta shows no response.
C) Both alpha and beta are deflected in the same direction, while gamma shows no response.
D) Alpha and beta are deflected in opposite directions, while gamma shows no response.
E) Only alpha is deflected, while beta and gamma show no response.
22) The subatomic particles in the atomic nucleus are
A) Protons, electrons
B) Electrons, neutrons
D) none of the above
E) Neutrons, only neutrons
23) The ----- and ------ reside in the nucleus of an atom.
A) electrons
B) protons, neutrons, and electrons
C) protons and neutrons
D) protons and electrons
C) Protons, neutrons
E) protons
24) Which one of the following is not true concerning cathode rays?
A) They originate from the negative electrode.
B) They travel in straight lines in the absence of electric or magnetic fields.
C) They impart a negative charge to metals exposed to them.
D) They are made up of electrons.
E) The characteristics of cathode rays depend on the material from which they are emitted.
25) The charge on an electron was determined in the __________.
A) cathode ray tube, by J. J. Thompson
B) Rutherford gold foil experiment
C) Millikan oil drop experiment
D) Dalton atomic theory
E) atomic theory of matter
26) __________-rays consist of fast-moving electrons.
A) Alpha
B) Beta
D) X
E) none of the above
C) Gamma
27) The gold foil experiment __________.
A) confirmed the plum-pudding model of the atom
B) led to the discovery of the atomic nucleus
C) was the basis for Thomson's model of the atom
D) utilized the deflection of beta particles by gold foil
E) proved the law of multiple proportions
28) In the Rutherford nuclear-atom model, __________.
A) the heavy subatomic particles, protons and neutrons, reside in the nucleus
B) the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the
same mass
C) the light subatomic particles, protons and neutrons, reside in the nucleus
D) mass is spread essentially uniformly throughout the atom
E) the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the
same mass and mass is spread essentially uniformly throughout the atom
29) Cathode rays are __________.
A) neutrons
D) protons
B) x-rays
E) atoms
C) electrons
30) Cathode rays are deflected away from a negatively charged plate because __________.
A) they are not particles
B) they are positively charged particles
C) they are neutral particles
D) they are negatively charged particles
E) they are emitted by all matter
31) In the absence of magnetic or electric fields, cathode rays __________.
A) do not exist
B) travel in straight lines
C) cannot be detected
D) become positively charged
E) bend toward a light source
32) Of the three types of radioactivity characterized by Rutherford, which is/are electrically charged?
A) β-rays
B) α-rays and β-rays
C) α-rays, β-rays, and γ-rays
D) α-rays
E) α-rays and γ-rays
33) Of the three types of radioactivity characterized by Rutherford, which is/are not electrically charged?
A) α-rays
B) α-rays, β-rays, and γ-rays
C) γ-rays
D) α-rays and β-rays
E) α-rays and γ-rays
34) Of the three types of radioactivity characterized by Rutherford, which are particles?
A) β-rays
B) α-rays, β-rays, and γ-rays
C) γ-rays
D) α-rays and γ-rays
E) α-rays and β-rays
35) Of the three types of radioactivity characterized by Rutherford, which is/are not particles?
A) β-rays
B) α-rays and β-rays
C) α-rays
D) γ-rays
E) α-rays, β-rays, and γ-rays
36) Of the following, the smallest and lightest subatomic particle is the __________.
A) neutron
B) proton
C) electron
D) nucleus
E) alpha particle
37) All atoms of a given element have the same __________.
A) mass
B) number of protons
C) number of neutrons
D) density
E) number of electrons and neutrons
38) The nucleus of an atom does not contain __________.
A) protons
B) protons or neutrons
D) subatomic particles
E) electrons
C) neutrons
39) The nucleus of an atom contains __________.
A) electrons
B) protons
C) neutrons
D) protons and neutrons
E) protons, neutrons, and electrons
Bohr Model
40) If r1 is the smallest orbital radius around a single proton, then r4 is equal to []
A) 16 r1.
B) 12 r1.
C) 6 r1.
D) 2.45 r1.
E) 0.17 r1.
41) The binding energy of the hydrogen atom in its ground state is -13.6 eV. What is the energy when it is in the
n = 4 state? []
A) 2.72 eV
B) -2.72 eV
C) 0.544 eV
D) -0.85 eV
D) 5.44 eV
42) A hydrogen atom in the ground state absorbs a photon of energy 12.09 eV. To which state will the electron
make a transition? []
A) n = 2
B) n = 3
C) n = 4
D) n = 5
D) n = 6
43) What is the amount of energy required to remove the electron from neutral hydrogen atom?
A) 27.2 eV
B) 13.6 eV
C) 6.8 eV
D) 3.4eV
E) none of the given answers
44) In making a transition from state n = 1 to state n = 2, the hydrogen atom must
A) absorb a photon of energy 10.2 eV.
B) emit a photon of energy 10.2 eV.
C) absorb a photon of energy 13.58 eV.
D) emit a photon of energy 13.58 eV.
E) none of the given answers
45) The electron of a hydrogen atom makes a transition from the n = 5 state to the n = 2 state. What is the
wavelength of the emitted photon? []
A) 344 nm
B) 430 nm
C) 443 nm
D) 523 nm
D) 235 nm
46) In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state n = 2? []
A) -6.79 eV
B) -4.53 eV
C) -3.40 eV
D) -1.51 eV
E) -0.51 eV
47) The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states
involved in laser action? []
A) 1.537 eV
B) 1.646 eV
C) 1.786 eV
D) 1.812 eV
E) 1.951 eV
48) An electron is moving about a single proton in an orbit characterized by n = 4. How many of the electron's de
Broglie wavelengths fit into the circumference of this orbit? []
A) 1
B) 2
C) 4
D) 16
D) 32
ANSWERS
1) A
2) B
3) A
4) B
5) A
6) A
7) C
8) B
9) D
10) E
11) C
12) D
13) B
14) B
15) C
16) A
17) B
18) C
19) D
20) E
21)
22)
23)
24)
25)
26)
27)
28)
29)
30)
31)
32)
33)
34)
35)
36)
37)
38)
39)
D
C
C
E
C
B
B
A
C
D
B
B
C
E
D
C
B
E
D
40)
41)
42)
43)
44)
45)
46)
47)
48)
A
D
B
B
A
B
C
C
C