Deck 7: The Structure of Atoms

Question 1

​A device emits light at 219.4 nm.What is the frequency of this radiation?

A) ​1.37 × 10^-3 Hz
B) 3.31 × 10²⁶ Hz
C) 1.37 × 10¹⁵ Hz
D) 9.07 × 10^-37 Hz
E) 9.07 × 10^-19 Hz

Answer 1

1.37 × 10¹⁵ Hz

Question 2

According to the Bohr model of the hydrogen atom,the energy necessary to excite an electron from energy level n = 4 to n = 5 is _____ the energy necessary to excite an electron from energy level n = 6 to n = 7.

A) less than
B) greater than
C) equal to
D) either equal to or greater than
E) either less than or equal to

Answer 2

less than

Question 3

What is the binding energy of an electron in a photosensitive metal (in kJ/mol)if the longest wavelength of light that can eject electrons from the metal is 299.0 nm?

A) 279 kJ/mol
B) 400 kJ/mol
C) 792 kJ/mol
D) 2.50 × 10¹⁹ kJ/mol
E) 4.00 × 10^-20 kJ/mol

Answer 3

400 kJ/mol

Question 4

What is the frequency of gamma ray radiation that has a wavelength of 11.4 pm?

A) 3.80 × 10^-20 s^-1
B) 1.74 × 10^-14 s^-1
C) 2.63 × 10⁷ s^-1
D) 3.42 × 10⁹ s^-1
E) 2.63 × 10¹⁹ s^-1

Question 5

What is the energy per mole of photons of light with a wavelength of 690.8 nm?

A) 2.88 × 10^-19 kJ/mol
B) 4.16 × 10¹⁴ kJ/mol
C) 2.61 × 10³⁵ kJ/mol
D) 4.34 × 10¹⁴ kJ/mol
E) 1.73 × 10² kJ/mol

Question 6

What is the energy per mole of photons of light with a frequency of 9.01 × 10¹⁴ Hz?

A) 2.21 × 10^-31 kJ/mol
B) 3.6 × 10² kJ/mol
C) 2 × 10²³ kJ/mol
D) 1.33 × 10^-10 kJ/mol
E) 3.33 × 10² kJ/mol

Question 7

Which of the following regions of the electromagnetic spectrum has the lowest frequency?

A) x-ray
B) gamma ray
C) ultraviolet
D) infrared
E) visible

Question 8

What is the wavelength of a photon that has an energy of J

A) ​ nm
B) ​ nm
C) ​ nm
D) nm
E) nm

Question 9

If the energy of 1.00 mole of photons is 245 kJ,what is the wavelength of the light?

A) 122 nm
B) 488 nm
C) 1220 nm
D) 787 nm
E) 811 nm

Question 10

Which of the following colors of visible light has the longest wavelength?

A) green
B) orange
C) red
D) yellow
E) blue

Question 11

If a cordless phone operates at a frequency of 9.00 × 10⁸ s^-1,what is the wavelength of this radiation?

A) 0.333 m
B) 1.99 m
C) 3.33 × 10^-9 m
D) 3.71 × 10^-18 m
E) 2.70 × 10¹⁷ m

Question 12

A device operates at a frequency of Hz.What is the wavelength of this radiation?

A) ​390 nm
B) nm
C) nm
D) 0.153 nm
E) nm

Question 13

The energy required to break one mole of fluorine-fluorine bonds in F₂ is 155 kJ/mol.What is the longest wavelength of light capable of breaking a single F-F bond?

A) 0.972 nm
B) 617 nm
C) 630 nm
D) 772 nm
E) 972 nm

Question 14

What is the wavelength of a photon having a frequency of 54.1 THz? (1 THz = 1015 Hz)

A) ​0.180 nm
B) 3.59 × 10^-23 nm
C) 1.08 × 10^-14 nm
D) 5.55 nm
E) 5.55 × 10¹⁵ nm

Question 15

What is the energy of a photon of electromagnetic radiation with a frequency of Hz?

A) ​ J
B) ​ J
C) ​ J
D) J
E) J

Question 16

A red laser pointer emits light at a wavelength of 488 nm.If the laser emits 7.5 × 10^-4 J of energy per second in the form of visible radiation,how many photons per second are emitted from the laser?

A) 4.1 × 10^-19 photons/sec
B) 5.4 × 10^-16 photons/sec
C) 8.9 × 10¹⁴ photons/sec
D) 1.8 × 10¹⁵ photons/sec
E) 2.5 × 10¹⁸ photons/sec

Question 17

A light emitting diode (L.E.D.)emits photons with an energy of J.What is the energy per mole of photons emitted? ​

A) J/mol
B) J/mol
C) J/mol
D) J/mol
E) J/mol

Question 18

The ____ of a photon of light is ____ proportional to its frequency and ____ proportional to its wavelength.

A) energy,directly,inversely
B) energy,inversely,directly
C) velocity,directly,inversely
D) intensity,inversely,directly
E) amplitude,directly,inversely

Question 19

Which of the following ranks the regions of the electromagnetic spectrum from shortest to longest wavelength.

A) microwaves > x-rays> gamma rays > visible > infrared
B) gamma rays > x-rays > visible > infrared> microwaves
C) infrared > gamma rays > x-rays > visible > microwaves
D) x-rays > gamma rays > infrared > visible > microwaves
E) visible > infrared > microwaves > x-rays > gamma rays

Question 20

​What is the energy of a photon of electromagnetic radiation with a wavelength of 165.2 nm?

A) ​ J
B) ​ J
C) ​ J
D) J
E) J

Question 21

For which of the following electron transitions would a hydrogen atom emit a photon of the longest wavelength?

A)
B)
C)
D)

Question 22

How many f orbitals are in the n = 4 shell?

A) 5
B) 8
C) 3
D) 1
E) 7

Question 23

Which type of experiment demonstrates that light has the properties of a particle?

A) nuclear fission
B) electron diffraction
C) light emission from atomic gases
D) mass spectroscopy
E) photoelectric effect

Question 24

The electron in a hydrogen atom,originally in level n = 10,undergoes a transition to a lower level by emitting a photon of wavelength 1739 nm.What is the final level of the electron? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J·s,R_H = 2.179 × 10^-18 J)

A) ​4
B) ​5
C) ​10
D) ​20
E) 1

Question 25

If the de Broglie wavelength of an electron is 44 nm,what is its velocity? (The mass of an electron is 9.11 × 10^-31 kg.)

A) 6.0 × 10^-5 m/s
B) 1.2 × 10³ m/s
C) 1.7 × 10⁴ m/s
D) 3.1 × 10¹⁰ m/s
E) 4.8 × 10²² m/s

Question 26

For which of the following transitions would a hydrogen atom absorb a photon with the longest wavelength?

A) n = 1 to n = 2
B) n = 4 to n = 6
C) n = 5 to n = 4
D) n = 7 to n = 6
E) n = 6 to n = 7

Question 27

If a hydrogen atom in the excited n = 3 state relaxes to the ground state,what is the maximum number of possible emission lines?

A) 1
B) 3
C) 6
D) 8
E) infinite

Question 28

Which of the following sets of quantum numbers is not allowed?

A) n = 4, = 2,and = -2
B) n = 6, = 1,and = 1
C) n = 5, = 4,and = -4
D) n = 2, = 1,and = -3
E) n = 6, = 3,and = -2

Question 29

In Bohr's atomic theory,when an electron moves from one energy level to another energy level more distant from the nucleus,

A) energy is absorbed.
B) light is emitted.
C) energy is emitted.
D) no change in energy occurs.
E) none of these

Question 30

What is the de Broglie wavelength of a 146-g baseball traveling at 99 mph? (1 mi = 1.609 km and h = 6.63 × 10^-34 J·s)

A) 3.51 × 10³⁷ m
B) 1.03 × 10^-34 m
C) 1.03 × 10^-37 m
D) 9.74 × 10³³ m
E) 2.85 × 10^-38 m

Question 31

How many orbitals have the following set of quantum numbers: n = 5, = 3, = -1?

A) 0
B) 1
C) 3
D) 6
E) 7

Question 32

What is the de Broglie wavelength of an electron traveling at 5.18% of the speed of light? (c = 3.00 × 10⁸ m/s,h = 6.63 × 10^-34 J·s,m_e = 9.109 × 10^-31 J)

A) 2.14 × 10¹⁰ m
B) 2.43 × 10^-12 m
C) 4.68 × 10^-11 m
D) 2.14 × 10¹² m
E) 4.68 × 10^-13 m

Question 33

For a proton (mass = 1.673 × 10^-27 kg)moving with a velocity of 2.83 × 10⁴ m/s,what is the de Broglie wavelength of the proton (in pm)?

A) 0.356 pm
B) 3.56 pm
C) 14.0 pm
D) 7.15 pm
E) 28.5 pm

Question 34

What is the total number of orbitals having n = 3 and = 2?

A) 1
B) 3
C) 5
D) 7
E) 10

Question 35

What is the value of the orbital angular momentum quantum number ( )for an electron in a 4f orbital?

A) 1
B) 4
C) 2
D) 3
E) 0

Question 36

Which of the following statements is INCORRECT?

A) It is not possible to know the exact location of an electron and its exact energy simultaneously.
B) The energies of an atom's electrons are quantized.
C) Quantum numbers define the energy states and the orbitals available to an electron.
D) The behavior of an atom's electrons can be described by circular orbits around a nucleus.
E) Electrons have both wave and particle properties.

Question 37

Which type of experiment demonstrates that an electron has the properties of a wave?

A) nuclear fission
B) electron diffraction
C) light emission from atomic gases
D) mass spectroscopy
E) photoelectric effect

Question 38

For which of the following transitions would a hydrogen atom emit the lowest energy photon?

A) n = 4 to n = 5
B) n = 5 to n = 2
C) n = 4 to n = 3
D) n = 3 to n = 1
E) n = 3 to n = 2

Question 39

The contribution for which de Broglie is best remembered in modern science is

A) his statement that no electron can have identical values for all four quantum numbers.
B) his proposal that particles of matter should be associated with wavelike behavior.
C) his statement that an electron can exist in an atom only in discrete energy levels.
D) his statement that elements show periodic repetition of properties.
E) his statement that electrons occupy all the orbitals of a given sublevel singly before pairing begins.

Question 40

What is the wavelength of light emitted when an electron in a hydrogen atom undergoes a transition from energy level n = 6 to level n = 1? (c = 3.00 × 10⁸ m/s,h = 6.63 × 10^-34 J·s,R_H = 2.179 × 10^-18 J)

A) 9.39 × 10^-8 kJ/mol
B) 7.06 × 10^-27 kJ/mol
C) 1.07 × 10⁷ kJ/mol
D) 2.12 × 10^-18 kJ/mol
E) 3.2 × 10¹⁵ kJ/mol

Question 41

How many values are there for the magnetic quantum number ( )when the value of the angular momentum quantum number ( )is 4?

A) 11
B) 9
C) 2
D) 4
E) 15

Question 42

What is the value of the spin quantum number for an electron in a 3d orbital?

A) 3
B) 2
C) either or
D)
E)

Question 43

Which of the following orbital can be represented by n = 4, = 3,and = -2?

A) 4s
B) 4p
C) 4d
D) 4f
E) None of these

Question 44

Which of the following sets of quantum numbers refers to a 4d orbital?

A) n = 2, = 1, = -1
B) n = 2, = 4, = -1
C) n = 4, = 2, = -1
D) n = 4, = 3, = 0
E) n = 4, = 3, = +2

Question 45

What is the total number of subshells found in the n = 7 shell?

A) 7
B) 49
C) 6
D) 8
E) 9

Question 46

A 4d orbital has ?

A) 3 planar nodes and 3 spherical nodes.
B) 1 planar node and 1 spherical node.
C) 2 planar nodes and 1 spherical node.
D) 2 planar nodes and 4 spherical nodes.
E) 4 planar nodes and 2 spherical nodes.

Question 47

What type of orbital is designated n = 4, = 2, = 2?

A) 4f
B) 4d
C) 4p
D) 4g
E) 4s

Question 48

Which of the following properties is associated with the value of the quantum number?

A) the shape of an orbital
B) the size of an orbital
C) the number of electrons in an orbital
D) the energy of an orbital
E) the orientation in space of an orbital

Question 49

The ________ quantum number is given the symbol .This quantum number is related to the orientation in space of an orbital.

Question 50

The (principal quantum number)n = ____ shell is the lowest that may contain s-orbitals.

A) 1
B) 2
C) 3
D) 4
E) 5

Question 51

Which type of orbital is designated n = 2 and = 1?

A) 2p
B) 3s
C) 4d
D) 1f
E) 2d

Question 52

A ________,designated by the Greek symbol ψ,describes the wave behavior of an electron in an atom.

Question 53

The Bohr model predicts that the energy of an atom's electron is _____.It means that the electron can only occupy orbitals of specific energies.

Question 54

Which of the following sets of quantum numbers (n,l,ml_, m_s)is not permissible?

A) 2 2 1 +
B) 3 1 0 -
C) 1 0 0 +
D) 2 1 0 +
E) 4 0 0 -

Question 55

Which of the following is a representation of a 3d_xy orbital?

A)
B)
C)
D)
E)

Question 56

According to Heisenberg's _____ principle,it is impossible to simultaneously measure the exact location and energy of an electron.

Question 57

Which of the following properties of orbital is associated with the value of the principal quantum number?

A) Number of electrons in an orbital
B) Size of an orbital
C) Orientation in space of an orbital
D) Energy of an orbital
E) Shape of an orbital

Question 58

A point in a standing wave that has zero amplitude is called a(n)________.

Question 59

Which of the following orbital boundary surfaces is a representation of a orbital?

A)
B)
C)
D)
E)

Question 60

Which of the following orbital boundary surfaces represent d-orbitals?

A) 1 only
B) 3 only
C) 2 only
D) 1 and 2
E) 1 and 4

Question 61

The size of an electron orbital is often chosen to be the distance within which 90% of the electron density is found.Why is the orbital radius not chosen to be the distance within which 100% of the electron density is found?

Question 62

Occupied states or energy levels in the hydrogen atom with n > 1 are called _____ states.

Question 63

What evidence does the photoelectric effect provide that photons are not only waves?

Question 64

The difference in energy between adjacent energy levels in an atom _____ as n increases.

Question 65

Which of the following is the correct series of lines that have energies in visible region of the hydrogen spectrum?

A) Balmer series
B) Lyman series
C) Brackett series
D) Pfund series
E) Humphreys series