Question 1

Electromagnetic radiation with a wavelength of 471 nm appears as blue light to the human eye. The energy of one photon of this light is 4.22 × J. Thus, a laser that emits of energy in a pulse of light at this wavelength produces ________ photons in each pulse. A) 1.5 × B) 1.2 × 10^-23 C) 3.2 × D) 3.1 × E) 6.5 ×

Accepted Answer

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Question 2

The element that corresponds to the electron configuration 1s²2s²2p² is ________. A) nitrogen B) lithium C) hydrogen D) phosphorus E) carbon

Accepted Answer

The electron configuration 1s²2s²2p² corresponds to carbon, which has 6 electrons.

Question 3

Give the electron configuration for O. A) 1s²2s²2p⁴ B) 1s²2p⁴ C) 1s²2s²2p³ D) 1s²2s²2p⁵ E) 1s²2s²2p²

Accepted Answer

Oxygen has 8 electrons, and its electron configuration is 1s² 2s² 2p⁴.

Question 4

The complete electron configuration of chromium, element 24, is ________. A) 3p8 B) 3p⁶ C) 1s⁴2s⁴2p¹⁰3s²3p⁴ D) 1s²2s²2p⁶3s²3p⁶3d⁵4s¹ E) 1s⁴2s⁴2p⁸3s⁴3p⁴

Accepted Answer

Chromium has 24 electrons. The electron configuration of the neutral atom can be determined by using the Aufbau principle (filling orbitals in order of increasing energy) and Hund's rule (maximizing the number of unpaired electrons). The correct configuration is 1s²2s²2p⁶3s²3p⁶4s¹³d⁵. Choice D is the only one that follows this configuration.

Question 5

Choose the valence orbital diagram that represents the ground state of Se²⁻. A) B) C) D) E)

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The answer of Choose the valence orbital diagram that represents...

Question 6

How many subshells are there in the shell with n = 4?
A) 3
B) 4
C) 6
D) 18

Accepted Answer

The number of subshells in a shell is equal to its principal quantum number (n). Therefore, for n = 4, there are 4 subshells: 4s, 4p, 4d, and 4f. Choice B is the correct answer because it indicates that there are 4 subshells in the n=4 shell.

Question 7

Why do atoms only emit certain wavelengths of light when they are excited? (Why do line spectra exist?)

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Question 8

For a hydrogen atom, which electronic transition would result in the emission of a photon with the highest energy?
A) 2s → 3p
B) 2p → 6d
C) 6p → 4s
D) 7f → 5d

Accepted Answer

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Question 9

Which ion does not have a noble gas configuration in its ground state? A) Sc³⁺ B) Al³⁺ C) Ga³⁺ D) As^3-

Accepted Answer

The answer of Which ion does not have a noble...

Question 10

An FM radio station broadcasts electromagnetic radiation at a frequency of 100.5 MHz. The wavelength of this radiation is ________ m.
A) 3.015 × 
B) 3.015 × 
C) 0.3350
D) 2.985 × 
E) 2.985

Accepted Answer

The answer of An FM radio station broadcasts electromagnetic radiation...

Question 11

The de Broglie wavelength of an electron with a velocity of 9.00 × m s^-1 is ________ m. The mass of the electron is 9.11 × g. A) 1.24 × 10¹⁰ B) 1.24 × 10¹³ C) 8.08 × 10^-17 D) 8.08 × 10-14 E) 8.08 × 10^-11

Accepted Answer

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Question 12

How many orbitals are there in the fourth shell?
A) 3
B) 4
C) 6
D) 16

Accepted Answer

The fourth shell (n=4) has four types of orbitals: s, p, d, and f, with 1, 3, 5, and 7 orbitals respectively, totaling 16 orbitals.

Question 13

What is the photoelectric effect?

Accepted Answer

The answer of What is the photoelectric effect?...

Question 14

For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4d orbital to a 2p orbital in a hydrogen atom? The Rydberg constant is 1.097 × 10^-2 nm^-1. A) 656.3 nm B) 486.2 nm C) 364.6 nm D) 2.057 × 10^-3 nm

Accepted Answer

The wavelength of the photon emitted can be calculated using the Rydberg formula: $ \frac{1}{\lambda} = R \left( \frac{1}{n_1^2} - \frac{1}{n_2^2} \right) $, where $ \lambda $ is the wavelength, $ R $ is the Rydberg constant, $ n_1 $ is the lower energy level, and $ n_2 $ is the higher energy level. For a transition from 4d to 2p in hydrogen, $ n_1 = 2 $ and $ n_2 = 4 $. Plugging these values into the formula gives a wavelength that corresponds to the value in choice B, 486.2 nm.

Question 15

What are the possible values of n and m_l for an electron in a 3d orbital? A) n = 1, 2, or 3 and m_l = 2 B) n = 1, 2, or 3 and m_l = -2, -1, 0, +1, or +2 C) n = 4 and m_l = 2 D) n = 3 and m_l = -2, -1, 0, +1, +2

Accepted Answer

For a 3d orbital, n = 3 and m_l can be -2, -1, 0, +1, or +2.

Question 16

Define diffraction.

Accepted Answer

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Question 17

Electromagnetic radiation with a wavelength of 585 nm appears as yellow light to the human eye. The energy of one photon of this light is ________ J. A) 2.94 × B) 1.16 × 10^-31 C) 1.16 × 10-22 D) 3.40 × E) 3.40 ×

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Question 18

Define constructive interference.

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Question 19

What are the possible values of l if n = 6?
A) 6
B) 0, 1, 2, 3, 4, or 5
C) -4, -3, -2, -1, 0, +1, +2, +3, or +4
D) -5, -4, -3, -2, -1, 0, +1, +2, +3, +4, or +5

Accepted Answer

For a given value of n, the possible values of l range from 0 to (n-1). 
Therefore, for n = 6, the possible values of l are 0, 1, 2, 3, 4, or 5, which is option B. Options A, C, and D are outside of the range of possible values of l.

Question 20

Electromagnetic radiation with a wavelength of 525 nm appears as green light to the human eye. The frequency of this light is ________  .
A) 1.75 × 
B) 5.71 × 
C) 1.58 × 
D) 1.58 × 
E) 5.71 ×

Accepted Answer

The answer of Electromagnetic radiation with a wavelength of 525...

Quiz 7: The Quantum-Mechanical Model of the Atom

Electromagnetic radiation with a wavelength of 471 nm appears as blue light to the human eye. The energy of one photon of this light is 4.22 × J. Thus, a laser that emits of energy in a pulse of light at this wavelength produces ________ photons in each pulse.

The element that corresponds to the electron configuration 1s22s22p2 is ________.

Give the electron configuration for O.

The complete electron configuration of chromium, element 24, is ________.

Choose the valence orbital diagram that represents the ground state of Se2⁻.

How many subshells are there in the shell with n = 4?

Why do atoms only emit certain wavelengths of light when they are excited? (Why do line spectra exist?)

For a hydrogen atom, which electronic transition would result in the emission of a photon with the highest energy?

Which ion does not have a noble gas configuration in its ground state?

An FM radio station broadcasts electromagnetic radiation at a frequency of 100.5 MHz. The wavelength of this radiation is ________ m.

The de Broglie wavelength of an electron with a velocity of 9.00 × m s-1 is ________ m. The mass of the electron is 9.11 × g.

How many orbitals are there in the fourth shell?

What is the photoelectric effect?

For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4d orbital to a 2p orbital in a hydrogen atom? The Rydberg constant is 1.097 × 10-2 nm-1.

What are the possible values of n and ml for an electron in a 3d orbital?

Define diffraction.

Electromagnetic radiation with a wavelength of 585 nm appears as yellow light to the human eye. The energy of one photon of this light is ________ J.

Define constructive interference.

What are the possible values of l if n = 6?

Electromagnetic radiation with a wavelength of 525 nm appears as green light to the human eye. The frequency of this light is ________ .

The element that corresponds to the electron configuration 1s²2s²2p² is ________.

Choose the valence orbital diagram that represents the ground state of Se²⁻.

The de Broglie wavelength of an electron with a velocity of 9.00 × m s^-1 is ________ m. The mass of the electron is 9.11 × g.

For hydrogen, what is the wavelength of the photon emitted when an electron drops from a 4d orbital to a 2p orbital in a hydrogen atom? The Rydberg constant is 1.097 × 10^-2 nm^-1.

What are the possible values of n and m_l for an electron in a 3d orbital?