Question 1

What is the energy (E, in joules)  of the 514.5 nm photons emitted by an argon-ion laser?

Accepted Answer

A)  4.29 * 10-36 J
B)  2.33 * 1035 J
C)  4.29 * 10-45 J
D)  3.86 * 10-19 J
E)  3.86 * 10-28 JF) A) and E)
G) B) and D)

Question 2

Which statement below regarding the Bohr model of the atom is FALSE?

Accepted Answer

A)  Changes in the energy of the atom involve the electron transitioning between allowed orbits.
B)  The atom has discrete energy levels described by a quantum number n.
C)  The electron does not radiate energy and spiral into the nucleus if it is in an allowed orbit.
D)  The atom has zero energy when in its ground state.
E)  The energy of an orbit is inversely proportional to N2.F) C) and E)
G) A) and C)

Question 3

How many electrons in an atom can have quantum numbers n = 4,  l l l  = 1?

Accepted Answer

A)  1
B)  2
C)  6
D)  4
E)  10 F) None of the above
G) A) and E)

Question 4

Which of the following occurs only in discrete (quantized)  increments?

Accepted Answer

A)  the speed a car drives on the interstate
B)  the altitude at which an airplane flies
C)  time
D)  the level of water in a sink
E)  moneyF) A) and D)
G) B) and C)

Question 5

Which of the following objects, all moving at the same speed, will have the longest de Broglie wavelength?

Accepted Answer

A)  a proton
B)  an electron
C)  a baseball
D)  a neon atom
E)  a neutronF) B) and C)
G) A) and E)

Question 6

The atomic radius of germanium (Z = 32)  is smaller than the atomic radius of potassium (Z = 19)  because of _______.

Accepted Answer

A)  a change in the n quantum number.
B)  an increase in the effective nuclear charge.
C)  the fact that p and d orbitals have the same orbital penetration.
D)  a decrease in the effective nuclear charge.
E)  germanium having 32 rather than 19 electrons.F) B) and C)
G) B) and E)

Question 7

Which of the following is the ground-state electron configuration of the Ca2+ ion?

Accepted Answer

A)  [Ar]4s23d2
B)  [Ar]4s2
C)  [Ar]4s24p2
D)  [Ne]3s23p6
E)  [Ne]3s23p8F) B) and E)
G) A) and D)

Question 8

What is the kinetic energy of the photoelectrons emitted from a sodium surface ( Φ\varPhiΦ  = 2.9 * 10-19 J)  when it is irradiated by photons with a wavelength of 350 nm?

Accepted Answer

A)  2.9 *10-19 J
B)  5.7 * 10-19 J
C)  0 J
D)  2.8 * 10-19 J
E)  3.6 * 10-19 J F) D) and E)
G) B) and D)

Question 9

How many times longer is the de Broglie wavelength of a helium atom (6.647 *10-27 kg)  moving at 220 m/s than that of a baseball (0.145 kg)  moving at 35 m/s?

Accepted Answer

A)  3.5 *1024
B)  2.2 *1025
C)  9.5 * 1033
D)  1.5 * 109
E)  3.7 * 1034F) C) and D)
G) None of the above

Question 10

How many orbitals are possible for the n = 3 shell?

Accepted Answer

A)  1
B)  2
C)  3
D)  6
E)  9F) A) and C)
G) All of the above

Question 11

Which set of quantum numbers below is allowed?

Accepted Answer

A)  n = 2,  l l l  = 2, ml = 0, ms = - ½
B)  n = 7,  l l l  = 0, ml = 0, ms = + ½
C)  n = 7,  l l l  = -1, ml = -1, ms = - ½
D)  n = 1,  l l l  = 2, ml = 0, ms = +½
E)  n = 5,  l l l  = 6, ml = -2, ms = - ½ F) All of the above
G) B) and E) B

Question 12

Which of the following is NOT an allowed value for the principal quantum number?

Accepted Answer

A)  1
B)  3
C)  10
D)  0
E)  2F) A) and E)
G) B) and C)

Question 13

Indicate which of the following photons can cause the emission of photoelectrons from a surface of gallium ( Φ\varPhiΦ = 6.7 * 10-19 J) .

Accepted Answer

A)  350 nm
B)  400 nm
C)  200 nm
D)  650 nm
E)  500 nm F) None of the above
G) A) and B) C

Question 14

Transition metal ions typically lose their outermost ns electrons before losing any (n - 1) d electrons.What is the best explanation of this frequently observed trend?

Accepted Answer

A)  The ns electrons have lower angular momentum.
B)  The (n - 1) d electrons have a larger average radius.
C)  The (n - 1) d orbitals can have more electrons with unpaired spins.
D)  The (n - 1) s and (n - 1) p subshells are full.
E)  The (n - 1) d electrons experience a higher Zeff than the ns electrons.F) None of the above
G) B) and E)

Question 15

Consider the radial distribution shown below for an electron in an s atomic orbital where r is the distance of the electron from the nucleus.  Identify: 
1) where the atomic nucleus is located, 
2) a radial node, 
3) the most probable distance of the electron from the nucleus, and 
4) the principal quantum number for this orbital.

Accepted Answer

1) The nucleus is located at A...

Question 16

What is the shortest wavelength of light emitted by an excited hydrogen atom when nfinal = 3?

Accepted Answer

A)  91.16 nm
B)  121.5 nm
C)  273.5 nm
D)  821.4 nm
E)  1875.8 nmF) A) and B)
G) D) and E)

Question 17

Sodium lamps emit yellow light with a nominal wavelength of 589 nm.What is the energy of these photons in kilojoules per mole?

Accepted Answer

A)  3.37 * 10-9 kJ/mol
B)  2.35 * 10-7 kJ/mol
C)  120 kJ/mol
D)  70.5 kJ/mol
E)  203 kJ/molF) A) and E)
G) D) and E) E

Question 18

An electron moving at _______ will have the smallest de Broglie wavelength.

Accepted Answer

A)  220 m/s
B)  20 mph
C)  3600 km/s
D)  25% of the speed of light
E)  2.998 *108 km/hrF) A) and B)
G) A) and C)

Question 19

Which transition in a hydrogen atom will cause emission of the shortest wavelength photon?

Accepted Answer

A)  ninitial = 5 to nfinal = 3
B)  ninitial = 4 to nfinal = 3
C)  ninitial = 4 to nfinal = 2
D)  ninitial = 3 to nfinal = 2
E)  ninitial = 3 to nfinal = 1F) B) and C)
G) None of the above

Question 20

The energy of a one-electron atom or ion is given by  (−2.178×10−18 J) Z2n2 \left(-2.178 	imes 10^{-18} \mathrm{~J}ight)  \frac{Z^{2}}{n^{2}} (−2.178×10−18 J) n2Z2​  where Z is the atomic number of the element.Which one-electron ion below would require the most energy to remove its electron?

Accepted Answer

A)  Li2+
B)  Be3+
C)  He+
D)  B4+
E)  C5+ F) C) and D)
G) A) and E)

Exam 3: Atomic Structure Explaining the Properties of Elements

What is the energy (E, in joules) of the 514.5 nm photons emitted by an argon-ion laser?

Correct Answer
verified

Which statement below regarding the Bohr model of the atom is FALSE?

Correct Answer
verified

How many electrons in an atom can have quantum numbers n = 4, $l$ = 1?

Correct Answer
verified

Which of the following occurs only in discrete (quantized) increments?

Correct Answer
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Which of the following objects, all moving at the same speed, will have the longest de Broglie wavelength?

Correct Answer
verified

The atomic radius of germanium (Z = 32) is smaller than the atomic radius of potassium (Z = 19) because of _______.

Correct Answer
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Which of the following is the ground-state electron configuration of the Ca²⁺ ion?

Correct Answer
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What is the kinetic energy of the photoelectrons emitted from a sodium surface ( $\varPhi$ = 2.9 * 10^-19 J) when it is irradiated by photons with a wavelength of 350 nm?

Correct Answer
verified

How many times longer is the de Broglie wavelength of a helium atom (6.647 *10^-27 kg) moving at 220 m/s than that of a baseball (0.145 kg) moving at 35 m/s?

Correct Answer
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How many orbitals are possible for the n = 3 shell?

Correct Answer
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Which set of quantum numbers below is allowed?

Correct Answer
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B

Which of the following is NOT an allowed value for the principal quantum number?

Correct Answer
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Indicate which of the following photons can cause the emission of photoelectrons from a surface of gallium ( $\varPhi$ = 6.7 * 10^-19 J) .

Correct Answer
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C

Transition metal ions typically lose their outermost ns electrons before losing any (n - 1) d electrons.What is the best explanation of this frequently observed trend?

Correct Answer
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Correct Answer
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1) The nucleus is located at A...
View Answer

What is the shortest wavelength of light emitted by an excited hydrogen atom when n_final = 3?

Correct Answer
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Sodium lamps emit yellow light with a nominal wavelength of 589 nm.What is the energy of these photons in kilojoules per mole?

Correct Answer
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E

An electron moving at _______ will have the smallest de Broglie wavelength.

Correct Answer
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Which transition in a hydrogen atom will cause emission of the shortest wavelength photon?

Correct Answer
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The energy of a one-electron atom or ion is given by $\left(-2.178 \times 10^{-18} \mathrm{~J}\right) \frac{Z^{2}}{n^{2}}$ where Z is the atomic number of the element.Which one-electron ion below would require the most energy to remove its electron?

Correct Answer
verified

Exam 3: Atomic Structure Explaining the Properties of Elements

What is the energy (E, in joules) of the 514.5 nm photons emitted by an argon-ion laser?

Correct AnswerverifiedShow Answer

Which statement below regarding the Bohr model of the atom is FALSE?

Correct AnswerverifiedShow Answer

How many electrons in an atom can have quantum numbers n = 4, l l l = 1?

Correct AnswerverifiedShow Answer

Which of the following occurs only in discrete (quantized) increments?

Correct AnswerverifiedShow Answer

Which of the following objects, all moving at the same speed, will have the longest de Broglie wavelength?

Correct AnswerverifiedShow Answer

The atomic radius of germanium (Z = 32) is smaller than the atomic radius of potassium (Z = 19) because of _______.

Correct AnswerverifiedShow Answer

Which of the following is the ground-state electron configuration of the Ca2+ ion?

Correct AnswerverifiedShow Answer

What is the kinetic energy of the photoelectrons emitted from a sodium surface ( Φ\varPhiΦ = 2.9 * 10-19 J) when it is irradiated by photons with a wavelength of 350 nm?

Correct AnswerverifiedShow Answer

How many times longer is the de Broglie wavelength of a helium atom (6.647 *10-27 kg) moving at 220 m/s than that of a baseball (0.145 kg) moving at 35 m/s?

Correct AnswerverifiedShow Answer

How many orbitals are possible for the n = 3 shell?

Correct AnswerverifiedShow Answer

Which set of quantum numbers below is allowed?

Correct AnswerverifiedB

Which of the following is NOT an allowed value for the principal quantum number?

Correct AnswerverifiedShow Answer

Indicate which of the following photons can cause the emission of photoelectrons from a surface of gallium ( Φ\varPhiΦ = 6.7 * 10-19 J) .

Correct AnswerverifiedC

Transition metal ions typically lose their outermost ns electrons before losing any (n - 1) d electrons.What is the best explanation of this frequently observed trend?

Correct AnswerverifiedShow Answer

Correct Answerverified1) The nucleus is located at A...View AnswerShow Answer

What is the shortest wavelength of light emitted by an excited hydrogen atom when nfinal = 3?

Correct AnswerverifiedShow Answer

Sodium lamps emit yellow light with a nominal wavelength of 589 nm.What is the energy of these photons in kilojoules per mole?

Correct AnswerverifiedE

An electron moving at _______ will have the smallest de Broglie wavelength.

Correct AnswerverifiedShow Answer

Which transition in a hydrogen atom will cause emission of the shortest wavelength photon?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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How many electrons in an atom can have quantum numbers n = 4, $l$ = 1?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Which of the following is the ground-state electron configuration of the Ca²⁺ ion?

Correct Answer
verified

What is the kinetic energy of the photoelectrons emitted from a sodium surface ( $\varPhi$ = 2.9 * 10^-19 J) when it is irradiated by photons with a wavelength of 350 nm?

Correct Answer
verified

How many times longer is the de Broglie wavelength of a helium atom (6.647 *10^-27 kg) moving at 220 m/s than that of a baseball (0.145 kg) moving at 35 m/s?

Correct Answer
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Correct Answer
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Correct Answer
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B

Correct Answer
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Indicate which of the following photons can cause the emission of photoelectrons from a surface of gallium ( $\varPhi$ = 6.7 * 10^-19 J) .

Correct Answer
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C

Correct Answer
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Correct Answer
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1) The nucleus is located at A...
View Answer

What is the shortest wavelength of light emitted by an excited hydrogen atom when n_final = 3?

Correct Answer
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Correct Answer
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E

Correct Answer
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Correct Answer
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Correct Answer
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