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Chapter 7 Electronic Structure of Atoms

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Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the most energy? 1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2

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1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2 Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the most energy?

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Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the longest wavelength? 1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2

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1.n = 5 to n = 4 2.n = 5 to n = 2 3.n = 3 to n = 1 4.n = 3 to n = 2 5.n = 4 to n = 2 Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the longest wavelength?

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What are the valence electrons of vanadium? 1.4s 2 2.3d 3 3.4s 2 3d 3 4.3d 5 5.4d 5

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1.4s 2 2.3d 3 3.4s 2 3d 3 4.3d 5 5.4d 5 What are the valence electrons of vanadium?

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What are the valence electrons of gallium? 1.4s 2 2.4p 1 3.4s 2 3d 10 4p 1 4.4s 2 3d s 2 4p 1

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1.4s 2 2.4p 1 3.4s 2 3d 10 4p 1 4.4s 2 3d s 2 4p 1 What are the valence electrons of gallium?

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What is the maximum number of orbitals described by the quantum numbers: n = 3 l = 2

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n = 3 l = 2 What is the maximum number of orbitals described by the quantum numbers:

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What is the maximum number of electrons described by the quantum numbers: n = 4

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What is the maximum number of electrons described by the quantum numbers: n = 4

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How many nodal planes does a d orbital have?

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How many nodal planes does a d orbital have?

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How many unpaired electrons does selenium have?

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How many unpaired electrons does selenium have?

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How many unpaired electrons does chromium have?

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How many unpaired electrons does chromium have?

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What is the wavelength for radiation transmitted by WGR, 550 AM (550 kHz)? m m m m m

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Correct Answer: m m m m m )s10(5.5 )ms10( c

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Predict which of the following electronic transitions will produce the longest wavelength spectral line. 1.n = 4 to n = 2 2.n = 5 to n = 2 3.n = 5 to n = 3 4.n = 6 to n = 4

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Correct Answer: 1.n = 4 to n = 2 2.n = 5 to n = 2 3.n = 5 to n = 3 4.n = 6 to n = 4 The wavelength increases as frequency decreases. The lowest frequency (longest wavelength) is associated with the lowest energy, and the smallest energy difference here is between n = 6 and n = 4.

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What is the wavelength of a helium 4 ion moving in a cyclotron at 1.0% the speed of light? Mass of helium 4 ion = 6.6 10 27 g 10 6 m 10 8 m 10 11 m 10 14 m

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Correct Answer: 10 6 m 10 8 m 10 11 m 10 14 m )ms10kg)(3.010(6.6 Js)10( mv h

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Which of the following is not an allowed set of quantum numbers? 1.n = 3, l = 1, m l = 1 2.n = 3, l = 3, m l = 2 3.n = 4, l = 0, m l = 0 4.n = 3, l = 1, m l = 1

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Correct Answer: 1.n = 3, l = 1, m l = 1 2.n = 3, l = 3, m l = 2 3.n = 4, l = 0, m l = 0 4.n = 3, l = 1, m l = 1 The value of l can be no larger than n 1.

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How many electrons maximum can exist in the 4d orbital?

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Correct Answer: There are five 4d orbitals, each of which can contain up to 2 electrons each for a total of 10 maximum.

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The electron subshell 3p represents the principal quantum number n = ___ and azimuthal quantum number l = ___. 1.3; 2 2.2; 3 3.3; 1 4.1; 3

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Correct Answer: 1.3; 2 2.2; 3 3.3; 1 4.1; 3 The principal quantum number n is 3, and a p orbital indicates l = 1.

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The maximum number of electrons in an atom that can exist in the 4f subshell and have m l = 1 is

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Correct Answer: For any value of m l, the maximum number of electrons is 2.

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The following orbital diagram represents the electron configuration of which element? 1.Carbon 2.Nitrogen 3.Oxygen 4.Neon 1s1s2s2s2p2p

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Correct Answer: 1.Carbon 2.Nitrogen 3.Oxygen 4.Neon 1s1s2s2s2p2p

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The element with the electronic configuration [Ar]4s 1 3d 5 is: 1.Manganese 2.Chromium 3.Magnesium 4.Iron

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Correct Answer: 1.Manganese 2.Chromium 3.Magnesium 4.Iron

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What is the characteristic outer shell electron configuration of the noble gases? 1.s 2 p 6 2.s 2 p 5 3.s 2 p 4 4.s 2 p 3

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Correct Answer: 1.s 2 p 6 2.s 2 p 5 3.s 2 p 4 4.s 2 p 3 Noble gases have completely filled s and p orbitals, hence their lack of reactivity.

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Which of the following orbital diagrams obeys Hund’s rule for a ground-state atom? s3s3d3d 3s3s3d 3s3s3d3d

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Correct Answer: s3s3d3d 3s3s3d3d 3s3s3d3d

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