Deck 6: Electronic Structure of Atoms

Question 1

Which electron configuration represents a violation of the Pauli exclusion principle?

A)

B)
C)

D)
E)

Answer 1

Question 2

Which electron configuration denotes an atom in its ground state?

A)

B)
C)

D)
E)

Answer 2

Question 3

The condensed electron configuration of silicon, element 14, is .

A) [Ne]2p¹⁰
B) [He]2s⁴
C) [He]2s⁴2p⁶
D) [He]2s⁶2p²
E) [Ne]3s²3p²

Answer 3

[Ne]3s²3p²

Question 4

Electromagnetic radiation with a wavelength of 640 nm appears as orange light to the human eye. The energy of one photon of this light is J.

A) 1.272 × 10^{- 22}
B) 3.220 × 10¹⁸
C) 1.272 × 10^{- 31}
D) 3.106 × 10^{- 19}
E) 3.106 × 10^{- 28}

Question 5

Which one of the following is an incorrect orbital notation?

A) 3p_y
B) 4s
C) 4d_xy
D) 3f
E) 2s

Question 6

An electron cannot have the quantum numbers n = , l = , m_l = .

A) 3, 2, - 2
B) 3, 2, 1
C) 1, 0, 0
D) 6, 1, 0
E) 3, 2, 3

Question 7

Which one of the following is not a valid value for the magnetic quantum number of an electron in a 5d subshell?

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

Question 8

Low- frequency electromagnetic fields with potential biological effects have frequencies of
Hz)

A) 400- 700
B) 10^{- 3}- 10^{- 5}
C) 1- 1000
D) 10^{- 5}- 10^{- 9}
E) 100- 10,000

Question 9

Which one of the following is correct?

A) u ÷ h = c
B) h = c u
C) u = ch
D) uh = c
E) u + h = c

Question 10

Which of the subshells below do not exist due to the constraints upon the azimuthal quantum number?

A) 2d
B) 2p
C) 2s
D) all of the above
E) none of the above

Question 11

In a p_x orbital, the subscript x denotes the _ of the electron.

A) axis along which the orbital is aligned
B) probability of the shell
C) energy
D) size of the orbital
E) spin of the electrons

Question 12

In the Bohr model of the atom, .

A) electron paths are controlled by probability
B) electrons travel in circular paths called orbitals
C) electrons can have any energy
D) electron energies are quantized
E) both A and C

Question 13

At maximum, an f- subshell can hold electrons, a d- subshell can hold electrons, and a p- subshell can hold electrons.

A) 14, 10, 6
B) 14, 8, 2
C) 2, 8, 18
D) 2, 6, 10
E) 2, 12, 21

Question 14

Which one of the following is the correct electron configuration for a ground- state nitrogen atom?

A)
B)

C)
D)

E) None of the above is correct.

Question 15

All of the orbitals in a given subshell have the same value of the quantum number.

A) magnetic
B) azimuthal
C) principal
D) A and B
E) B and C

Question 16

The orbital is degenerate with 5p_y in a many- electron atom.

A) 5p_x
B) 5d_xy
C) 5s
D) 4p_y
E) 5d²

Question 17

Which of the following elements has a ground- state electron configuration different from the predicted one?

A) Ca
B) Xe
C) Ti
D) Cl
E) Cu

Question 18

The condensed electron configuration of krypton, element 36, is .

A) [Kr]4s⁴3d⁸
B) [Ar]4s⁴3d⁴
C) [Ar]4s⁴
D) [Ar]3d¹⁰4s²4p⁶
E) [Kr]4s²3d⁸

Question 19

Which of the following is not a valid set of four quantum numbers? (n, l, m_l, m_s)

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

Question 20

Which one of the quantum numbers does not result from the solution of the Schroedinger equation?

A) angular momentum
B) principal
C) spin
D) azimuthal
E) magnetic

Question 21

Which set of three quantum numbers (n, l, m_l) corresponds to a 3d orbital?

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

Question 22

The complete electron configuration of gallium, element 31, is .

A) 1s⁴2s⁴2p⁸3s⁴3p⁸4s³
B) 1s⁴2s⁴2p⁶3s⁴3p⁶4s⁴3d³
C) 1s²2s²2p¹⁰3s²3p¹⁰4s²3d³
D) 1s⁴2s⁴2p¹⁰3s⁴3p⁹
E) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p¹

Question 23

Which one of the following represents an acceptable set of quantum numbers for an electron in an atom? (arranged as n, l, m_l, and m_s)

A) 3, 3, 3, - 1/2
B) 5, 4,- 5, 1/2
C) 2, 2, - 1, - 1/2
D) 1, 0, 0, 1/2
E) 3, 3, 3, 1/2

Question 24

The de Broglie wavelength of a will have the shortest wavelength when traveling at 30 cm/s.

A) marble
B) uranium atom
C) planet
D) car
E) hydrogen atom

Question 25

Which electron configuration represents a violation of Hund's rule for an atom in its ground state?

A)
B)

C)
D)

E)

Question 26

An electron cannot have the quantum numbers n = , l = , m_l = .

A) 1, 1, 1
B) 2, 0, 0
C) 3, 1, - 1
D) 2, 1, - 1
E) 3, 2, 1

Question 27

Which one of the following is an incorrect subshell notation?

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

Question 28

The ground- state electron configuration of the element is [Kr]5s¹4d⁵.

A) Cr
B) Tc
C) Nb
D) Mn
E) Mo

Question 29

Which one of the following configurations depicts an excited carbon atom?

A) 1s²2s²2p³
B) 1s²2s²2p¹
C) 1s²2s²3s¹
D) 1s²2s²2p¹3s¹
E) 1s²2s²2p²

Question 30

Which of the subshells below do not exist due to the constraints upon the azimuthal quantum number?

A) 4f
B) 4p
C) 4d
D) 4s
E) none of the above

Question 31

The valence shell of the element X contains 2 electrons in a 5s subshell. Below that shell, element X has a partially filled 4d subshell. What type of element is X?

A) alkali metal
B) chalcogen
C) transition metal
D) halogen
E) main group element

Question 32

How many different principal quantum numbers can be found in the ground state electron configuration of nickel?

A) 2
B) 3
C) 4
D) 5
E) 6

Question 33

Which one of the following configurations depicts an excited oxygen atom?

A) 1s²2s²2p²
B) 1s²2s²2p²3s²
C) [He]2s²2p⁴
D) 1s²2s²2p⁴
E) 1s²2s²2p¹

Question 34

In which orbital does an electron in a phosphorus atom experience the greatest effective nuclear charge?

A) 1s
B) 2s
C) 2p
D) 3s
E) 3p

Question 35

Electromagnetic radiation with a wavelength of 525 nm appears as green light to the human eye. The frequency of this light is s^{- 1}.

A) 5.71 × 10⁵
B) 1.58 × 10²
C) 1.58 × 10¹¹
D) 5.71 × 10¹⁴
E) 1.75 × 10^{- 15}

Question 36

Which quantum number determines the energy of an electron in a hydrogen atom?

A) m_l
B) n
C) E
D) l
E) n and l

Question 37

Which of the following is a valid set of four quantum numbers? (n, l, m_l, m_s)

A) 1, 0, 1, +1/2
B) 1, 1, 0, - 1/2
C) 2, 2, 1, - 1/2
D) 2, 1, +2, +1/2
E) 2, 1, 0, +1/2

Question 38

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 × 10^{- 19} J. Thus, a laser that emits 1.3 × 10^{- 2} J of energy in a pulse of light at this wavelength produces photons in each pulse.

A) 9.2 × 10^{- 24}
B) 2.9 × 10^{- 17}
C) 6.5 × 10¹³
D) 1.8 × 10¹⁹
E) 3.5 × 10¹⁶

Question 39

Which two elements have the same ground- state electron configuration?

A) Fe and Cu
B) Cu and Ag
C) Pd and Pt
D) Cl and Ar
E) No two elements have the same ground- state electron configuration.

Question 40

Which electron configuration represents a violation of the Pauli exclusion principle?

A)
B)

C)
D)

E)

Question 41

Which one of the following represents an acceptable possible set of quantum numbers (in the order n, l, m_l, m_s) for an electron in an atom?

A) 2, 0, 1, - 1/2
B) 2, 1, - 1, 1/2
C) 2, 2, 0, 1/2
D) 2, 1, 0, 0
E) 2, 0, 2, +1/2

Question 42

Which one of the following represents an impossible set of quantum numbers for an electron in an atom? (arranged as n, l, m_l, and m_s)

A) 5, 4, - 3, 1/2
B) 5, 4, - 3, - 1/2
C) 3, 3, 3, 1/2
D) 1, 0, 0, 1/2
E) 2, 1, - 1, - 1/2

Question 43

The element that corresponds to the electron configuration 1s²2s²2p⁶ is .

A) beryllium
B) neon
C) magnesium
D) sodium
E) lithium

Question 44

The photoelectric effect is .

A) the darkening of photographic film when exposed to an electric field
B) the total reflection of light by metals giving them their typical luster
C) the ejection of electrons by a metal when struck with light of sufficient energy
D) the production of current by silicon solar cells when exposed to sunlight
E) a relativistic effect

Question 45

The complete electron configuration of argon, element 18, is .

A) 1s²2s²2p¹⁰3s²3p²
B) 1s⁴2s⁴2p¹⁰
C) 1s⁶2s⁶2p²3s⁴
D) 1s²2s²2p⁶3s²3p⁶
E) 1s⁴2s⁴2p⁶3s⁴

Question 46

The wavelength of an electron with a velocity of 6.00 × 10⁶ m/s is m. The mass of the electron is 9.11 × 10^{- 28} g.

A) 8.25 × 10¹²
B) 8.25 × 10⁹
C) 1.21 × 10^{- 13}
D) 1.21 × 10^{- 16}
E) 1.21 × 10^{- 10}

Question 47

The ground state electron configuration of scandium is .

Question 48

The ground state electron configuration of Fe is .

A) 1s²2s²3s²3p¹⁰
B) 1s²2s²2p⁶3s²3p⁶4s²
C) 1s²2s²2p⁶3s²3p⁶3d⁶4s²
D) 1s²2s²3s²3p⁶3d⁶
E) 1s²2s²2p⁶3s²3p⁶4s²4d⁶

Question 49

Which electron configuration represents a violation of Hund's rule for an atom in its ground state?

A)

B)
C)

D)
E)

Question 50

The uncertainty principle states that _.

A) it is impossible to know how many electrons there are in an atom
B) it is impossible to know the exact position and momentum of an electron
C) it is impossible to know anything with certainty
D) matter and energy are really the same thing
E) there can only be one uncertain digit in a reported number

Question 51

The ground- state electron configuration of is [Ar]4s¹3d⁵.

A) Fe
B) K
C) V
D) Mn
E) Cr

Question 52

Which electron configuration represents a violation of Hund's rule for an atom in its ground state?

A)
B)

C)
D)

E)

Question 53

All of the orbitals in a given electron shell have the same value of the _ quantum number.

A) azimuthal
B) psi
C) magnetic
D) principal
E) spin

Question 54

Which quantum numbers must be the same for the orbitals that they designate to be degenerate in a one- electron system (such as hydrogen)?

A) n, l, and m_l
B) l and m_l
C) n only
D) m_l only
E) n and l only

Question 55

An FM radio station broadcasts electromagnetic radiation at a frequency of 100.6 MHz. The wavelength of this radiation is m.

A) 3.018 × 10¹⁶
B) 2.982 × 10⁶
C) 2.982
D) 0.3353
E) 3.018 × 10¹⁰

Question 56

According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both the position and the _ _ of an electron.

A) velocity
B) color
C) mass
D) shape
E) momentum

Question 57

Which quantum numbers must be the same for the orbitals that they designate to be degenerate in a many- electron system?

A) n, l, and m_l
B) n only
C) n, l, m_l, and m_s
D) n and l only
E) m_s only

Question 58

Which one of the following orbitals can hold two electrons?

A) 3s
B) 4d_xy
C) 2p_x
D) all of the above
E) none of the above

Question 59

Which electron configuration represents a violation of the Pauli exclusion principle?

A)
B)

C)
D)

E)

Question 60

The ground state electron configuration of Ga is _ _.

A) 1s²2s²3s²3p⁶3d¹⁰4s²4p¹
B) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4d¹
C) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p¹
D) [Ar]4s²3d¹¹
E) 1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p¹

Question 61

The de Broglie wavelength of a bullet (7.5g) traveling at 700 m/s is m.

A) 7.7 × 10³³
B) 1.3 × 10^{- 23}
C) 1.3 × 10^{- 34}
D) 6.2 × 10^{- 29}
E) 1.3 × 10^{- 27}

Question 62

Which one of the following is considered to be ionizing radiation ?

A) radio waves
B) X- rays
C) infrared radiation
D) microwaves
E) visible light

Question 63

The frequency of electromagnetic radiation required to promote an electron from n = 2 to n = 4 in a Bohr hydrogen atom is Hz.

A) 6.2 × 10¹⁴
B) 4.1 × 10^{- 19}
C) 8.2 × 10¹⁴
D) 4.1 × 10¹⁹
E) 5.4 × 10^{- 19}

Question 64

The ground state electron configuration of copper is .

Question 65

The electron configuration of the valence electrons of an atom in its ground state is ns²n p³.` This atom is a group _ element.

Question 66

All of the subshells in a given shell have the same energy in the hydrogen atom. In a many- electron atom, the subshells in a given shell do not have the same energy. Why?

Question 67

The shape of an orbital is defined by the azimuthal quantum number which is represented as letter

Question 68

Of the following, radiation has the shortest wavelength and radiation has the greatest energy.
Gamma ultraviolet visible

A) visible, gamma
B) visible, ultraviolet
C) gamma, gamma
D) ultraviolet, gamma
E) gamma, visible

Question 69

The energy (J) required for an electronic transition in a Bohr hydrogen atom from n = 2 to n = 3 is (J)

A) 3.0 × 10^{- 19}
B) - 3.0 × 10^{- 19}
C) - 7.9 × 10^{- 19}
D) 4.6 × 10¹⁴
E) 4.0 × 10^{- 19}

Question 70

What is the frequency of light (s^{- 1}) that has a wavelength of 3.12 × 10^{- 3} cm ?

A) 1.04 × 10^{- 13}
B) 4.10 × 10^{- 17}
C) 9.62 × 10¹²
D) 2.44 × 10¹⁶
E) 3.69

Question 71

The frequency of a photon that has an energy of 3.7 × 10^{- 18} J is s^{- 1}.

A) 5.6 × 10¹⁵
B) 1.8 × 10^{- 16}
C) 2.5 × 10¹⁵
D) 5.4 × 10^{- 8}
E) 2.5 × 10^{- 15}

Question 72

The ground state electron configuration for Zn is _ .

A) [Kr]4s²3d¹⁰
B) [Kr]3s²3d¹⁰
C) [Ar]4s²3d¹⁰
D) [Ar]4s¹3d¹⁰
E) [Ar]3s²3d¹⁰

Question 73

The energy of a photon that has a wavelength of 9.0 m is J.

A) 6.0 × 10^{- 23}
B) 2.2 × 10^{- 26}
C) 4.5 × 10^{- 25}
D) 2.7 × 10⁹
E) 4.5 × 10²⁵

Question 74

What wavelengths correspond to the visible region of the electromagnetic spectrum?

Question 75

Electromagnetic radiation travels through vacuum at a speed of _ m/s.

A) 186,000
B) 3.00 × 10⁸
C) 10,000
D) 125
E) It depends on wavelength.

Question 76

"The largest principal quantum number in the ground state electron configuration of francium is ?

Question 77

The n = 8 to n = 4 transition in the Bohr hydrogen atom occurs in the region of the electromagnetic spectrum.

A) infrared
B) X- ray
C) ultraviolet
D) visible
E) microwave

Question 78

Elements in group have a np⁵electron configuration in the outer shell.

Question 79

The largest principal quantum number in the ground state electron configuration of cobalt is

A) 2
B) 3
C) 4
D) 7
E) 9

Question 80

The _ subshell contains only one orbital.

A) 3d
B) 5d
C) 4s
D) 1p
E) 6f