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What is the electron configuration of indium?


A) 1s22s22p63s23p63d104s24d104p1
B) 1s22s22p63s23p63d104s24p64d105s25p15d10
C) 1s23s22p63s23p64s24p64d105s25d105p1
D) 1s22s22p63s23p63d104s24p64d105s25p1
E) none of these

F) B) and D)
G) A) and C)

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Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -[Kr] 4d105s25p1

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The element is In wi...

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From the following list of observations, choose the one that most clearly supports the conclusion of de Broglie wavelengths.


A) cathode "rays"
B) the scattering of alpha particles by metal foil
C) diffraction
D) the emission spectrum of hydrogen
E) the photoelectric effect

F) A) and B)
G) C) and D)

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Which of the following statements is(are) true? I. An excited atom can return to its ground state by absorbing electromagnetic radiation. II. The energy of an atom is increased when electromagnetic radiation is emitted from it. III. The energy of electromagnetic radiation increases as its frequency increases. IV. An electron in the n = 4 state in the hydrogen atom can go to the n = 2 state by emitting electromagnetic radiation at the appropriate frequency. V. The frequency and wavelength of electromagnetic radiation are inversely proportional to each other.


A) III, V
B) II, III, IV
C) I, II, IV
D) I, II, III
E) III, IV, V

F) A) and D)
G) D) and E)

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Write the electron configuration for the following: -O2-

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Which of the following statements is true about the ionization energy of Mg+?


A) It will be equal to and opposite in sign to the electron affinity of Mg.
B) It will be equal to and opposite in sign to the electron affinity of Mg+.
C) It will be equal to the ionization energy of Li.
D) It will be equal to and opposite in sign to the electron affinity of Mg2+.
E) none of the above

F) A) and B)
G) None of the above

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The first ionization energy of Mg is 735 kJ/mol. Calculate Zeff.


A) 2.25
B) 2.00
C) 4.00
D) 5.04
E) none of these

F) B) and E)
G) A) and E)

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How many electrons can be described by the quantum numbers n = 3, l = 1?


A) 5
B) 2
C) 3
D) 1
E) 6

F) C) and D)
G) D) and E)

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Consider the following orderings. I. Al < Si < P < Cl II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. Na+ < Mg2+ < Al3+ < Si4+ -Which of these give(s) a correct trend in ionization energy?


A) I, IV only
B) I, II only
C) I, III, IV
D) III only
E) none of them

F) A) and B)
G) B) and D)

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An electron in a one-dimensional box requires energy with wavelength 8080 nm to excite it from the n = 2 energy level to the n = 3 energy level. Calculate the length of the box.


A) 1.50 nm
B) 3.00 nm
C) 1.00 nm
D) 2.50 nm
E) 3.50 nm

F) C) and D)
G) D) and E)

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Which is the highest occupied energy orbital in a silicon atom?


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

F) A) and B)
G) A) and E)

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A photographic film needs a minimum of 80.0 kJ/mol for exposure. What is the longest wavelength of radiation with sufficient energy to expose the film?


A) 1.50 * 10-3 m
B) 1.50 *10-12 m
C) 1.50 * 10-6 m
D) 1.50 * 10-9 m
E) none of these

F) C) and D)
G) A) and E)

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From the following list of observations, choose the one that most clearly supports the conclusion that electromagnetic radiation has wave characteristics.


A) diffraction
B) the emission spectrum of hydrogen
C) the scattering of alpha particles by metal foil
D) cathode "rays"
E) the photoelectric effect

F) B) and D)
G) C) and D)

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Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -[Xe] 4f146s25d2

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The element is Hf wi...

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What is the electron configuration of Ti2+?


A) [Ar] 3d2
B) [Ar] 4s2
C) [Ar] 4s13d1
D) [Ar] 4s23d2
E) none of these

F) B) and C)
G) B) and E)

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The energy equation for a particle in a cubic box of dimensions Lx = Ly = Lz is Enx, ny, nz = The energy equation for a particle in a cubic box of dimensions L<sub>x</sub><sub> </sub>= L<sub>y</sub> = L<sub>z</sub><sub> </sub> is E<sub>nx, ny, nz</sub> = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level. A)In the ground state, how many of the 8 electrons have energy equal to ? B)In the ground state, how many of the 8 electrons have energy equal to ? C)In the ground state, how many of the 8 electrons have energy equal to ? D)Calculate the wavelength of light necessary to promote the highest-energy ground-state electron into the lowest-energy excited state. Assume a cubic box with dimensions 1.50 nm * 1.50 nm * 1.50 nm. Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level. A)In the ground state, how many of the 8 electrons have energy equal to The energy equation for a particle in a cubic box of dimensions L<sub>x</sub><sub> </sub>= L<sub>y</sub> = L<sub>z</sub><sub> </sub> is E<sub>nx, ny, nz</sub> = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level. A)In the ground state, how many of the 8 electrons have energy equal to ? B)In the ground state, how many of the 8 electrons have energy equal to ? C)In the ground state, how many of the 8 electrons have energy equal to ? D)Calculate the wavelength of light necessary to promote the highest-energy ground-state electron into the lowest-energy excited state. Assume a cubic box with dimensions 1.50 nm * 1.50 nm * 1.50 nm. ? B)In the ground state, how many of the 8 electrons have energy equal to The energy equation for a particle in a cubic box of dimensions L<sub>x</sub><sub> </sub>= L<sub>y</sub> = L<sub>z</sub><sub> </sub> is E<sub>nx, ny, nz</sub> = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level. A)In the ground state, how many of the 8 electrons have energy equal to ? B)In the ground state, how many of the 8 electrons have energy equal to ? C)In the ground state, how many of the 8 electrons have energy equal to ? D)Calculate the wavelength of light necessary to promote the highest-energy ground-state electron into the lowest-energy excited state. Assume a cubic box with dimensions 1.50 nm * 1.50 nm * 1.50 nm. ? C)In the ground state, how many of the 8 electrons have energy equal to The energy equation for a particle in a cubic box of dimensions L<sub>x</sub><sub> </sub>= L<sub>y</sub> = L<sub>z</sub><sub> </sub> is E<sub>nx, ny, nz</sub> = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level. A)In the ground state, how many of the 8 electrons have energy equal to ? B)In the ground state, how many of the 8 electrons have energy equal to ? C)In the ground state, how many of the 8 electrons have energy equal to ? D)Calculate the wavelength of light necessary to promote the highest-energy ground-state electron into the lowest-energy excited state. Assume a cubic box with dimensions 1.50 nm * 1.50 nm * 1.50 nm. ? D)Calculate the wavelength of light necessary to promote the highest-energy ground-state electron into the lowest-energy excited state. Assume a cubic box with dimensions 1.50 nm * 1.50 nm * 1.50 nm.

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A) 2
B)6
C...

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Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N?


A) Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N? A) B) C) D) E)
B) Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N? A) B) C) D) E)
C) Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N? A) B) C) D) E)
D) Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N? A) B) C) D) E)
E) Nitrogen has 5 valence electrons. Consider the following electron arrangements. -Which represents the ground state for N? A) B) C) D) E)

F) B) and C)
G) C) and E)

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The energy expressions for the electrons in the He+ ion and the hydrogen atom are En (H) = -a/n2 and En (He+) = -4a/n2 Which of the following statements is(are) correct? I. For the transitions The energy expressions for the electrons in the He<sup>+</sup> ion and the hydrogen atom are E<sub>n</sub> (H) = -a/n<sup>2</sup> and E<sub>n</sub> (He<sup>+</sup>) = -4a/n<sup>2</sup> Which of the following statements is(are) correct? I. For the transitions , the frequency is larger for H than for He+. II. The first ionization energy of the H atom is smaller than the second. III. The 1s orbital in He+ is larger (in the sense that the probability density is shifted outward) than the 1s orbital in H. A) III only B) I and II only C) I only D) I, II, and III E) II only , the frequency is larger for H than for He+. II. The first ionization energy of the H atom is smaller than the second. III. The 1s orbital in He+ is larger (in the sense that the probability density is shifted outward) than the 1s orbital in H.


A) III only
B) I and II only
C) I only
D) I, II, and III
E) II only

F) A) and D)
G) A) and E)

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How many electrons can be contained in all of the orbitals with n = 4?


A) 8
B) 10
C) 2
D) 18
E) 32

F) B) and D)
G) C) and D)

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What is the electron configuration of Co3+?


A) [Ar] 3d6
B) [Ar] 4s24d4
C) [Ar] 3d4
D) [Ar] 4s23d4
E) none of these

F) A) and B)
G) A) and C)

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