Question 1

Which is the correct electron configuration for gold?

Accepted Answer

Gold has an electron configuration of [Xe]4f¹⁴5d¹⁰6s¹, due to the stability provided by a filled 5d subshell and a half-filled 6s subshell.

Question 2

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹4d¹⁰?

Accepted Answer

The electron configuration provided, despite the unusual notation, corresponds to the element Silver (Ag). The correct configuration for Ag, when translated to standard notation, is [Kr] 4d^10 5s^1, which matches the pattern described in the question.

Question 3

Which of the following subshells has the highest energy in the element tantalum?

Accepted Answer

The energy level of an electron subshell increases with the principal quantum number (n) and the azimuthal quantum number (l). For tantalum, the 4f subshell has a higher energy than the other listed subshells because it has a higher azimuthal quantum number (l) compared to 4s, 4d, and even though 5p and 6s have higher principal quantum numbers, the 4f subshell's energy is exceptionally high due to its larger l value within the context of its electron configuration.

Question 4

What is the electron configuration for bromine?

Accepted Answer

The correct electron configuration for bromine, which has an atomic number of 35, is represented by the notation: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^5. This corresponds to choice E, following the order of filling the orbitals: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, and accounting for bromine's 35 electrons.

Question 5

How many electrons are in the 4p orbitals of selenium?

Accepted Answer

Selenium has an atomic number of 34, which means it has 34 electrons. Its electron configuration ends in 4p^4, indicating there are 4 electrons in the 4p orbitals.

Question 6

What is the electron configuration for tungsten?

Accepted Answer

The answer of What is the electron configuration for tungsten?
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Question 7

How many electrons are in the 4p orbitals of vanadium?

Accepted Answer

Vanadium has an atomic number of 23, which means it has 23 electrons. Its electron configuration is [Ar] 3d^3 4s^2, indicating that all its electrons are either in the 3d or 4s orbitals, with none in the 4p orbitals.

Question 8

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s¹3d⁵?

Accepted Answer

The electron configuration given contains a total of 24 electrons, which places it in the range of elements with atomic number between 21 and 30. Among the choices, only Cr (chromium) has an electron configuration that matches the given configuration. The other elements have either too few or too many electrons.

Question 9

If one s orbital were combined with one p orbital (dumbbell shaped), which would best describe the resulting shape?

Accepted Answer

The answer of If one s orbital were combined with...

Question 10

Emission spectra

Accepted Answer

Emission spectra can be used to identify unknown atoms based on the unique patterns of wavelengths they emit.

Question 11

List the following types of radiation from lowest frequency to highest frequency: microwave, X ray, ultraviolet, visible, and infrared

Accepted Answer

The electromagnetic spectrum is arranged by frequency from lowest to highest as follows: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Thus, the correct order from lowest to highest frequency is microwave, infrared, visible, ultraviolet, X-ray.

Question 12

What is the electron configuration for silicon?

Accepted Answer

The answer of What is the electron configuration for silicon?
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Question 13

What wavelength, in nm, can strike a metal surface and eject an electron with a kinetic energy of 1.89 × 10^-19 J if the binding energy of the metal is 289 kJ/mol?

Accepted Answer

The energy of the photon must equal the sum of the binding energy and the kinetic energy of the ejected electron. Convert the binding energy from kJ/mol to J per photon, then use the equation E = hc/λ to find the wavelength.

Question 14

An atom in its ground state contains 33 electrons. How many of these electrons are in p orbitals?

Accepted Answer

An atom with 33 electrons is arsenic (As). Its electron configuration in the ground state is [Ar] 3d^10 4s^2 4p^3. Counting the electrons in p orbitals, we have 3 from the 4p orbital and 6 from the 2p orbital (within the [Ar] core), totaling 9. However, we overlooked the 3p orbitals also within the [Ar] core, which adds another 6 electrons, leading to a total of 15 electrons in p orbitals.

Question 15

A 6.0-gram champagne cork is shot out of an opened champagne bottle and traveled at a speed of 65 km/hour. Calculate the de Broglie wavelength (in meters) of the cork.

Accepted Answer

The de Broglie wavelength is calculated using λ = h / (mv), where h is Planck's constant (6.626 × 10^-34 Js), m is mass (0.006 kg), and v is velocity (65 km/h = 18.06 m/s). This gives λ ≈ 6.1 × 10^-33 m.

Question 16

De Broglie explained electron movements by relating them to

Accepted Answer

De Broglie's theory of wave-particle duality proposed that particles, including electrons, exhibit both wave-like and particle-like behaviors. This means that electron movements can be explained by both waves and particles.

Question 17

How many electrons are in the 4d orbitals of Tc?

Accepted Answer

Technetium (Tc) has an atomic number of 43, which means it has 43 electrons. The electron configuration of Tc is [Kr] 4d^5 5s^2, indicating that there are 5 electrons in the 4d orbitals.

Question 18

How many electrons are there in the 2^nd principal energy level (n = 2) of a phosphorus atom?

Accepted Answer

The 2nd principal energy level can hold a maximum of 8 electrons. In a phosphorus atom, which has an atomic number of 15, the electron configuration is 1s² 2s² 2p⁶ 3s² 3p³. The 2nd energy level (2s² 2p⁶) contains 8 electrons.

Question 19

Which of the following elements has the largest number of unpaired electrons in the ground state?

Accepted Answer

To determine the number of unpaired electrons, we need to find the electron configuration for each element. 
A) K - [Ar] 4s1
B) V - [Ar] 3d3 4s2
C) S - [Ne] 3s2 3p4
D) Si - [Ne] 3s2 3p2
E) Cl - [Ne] 3s2 3p5

To find the number of unpaired electrons, we look at the valence shell, specifically the outermost subshell with electrons. 
A) K has one valence electron in the 4s subshell, so one unpaired electron. 
B) V has five valence electrons - three in the 3d subshell and two in the 4s subshell. In the ground state, one of the 3d electrons is unpaired, so one unpaired electron. 
C) S has six valence electrons, four in the 3p subshell and two in the 3s subshell. All of these electrons are paired, so zero unpaired electrons. 
D) Si has four valence electrons, two in the 3p subshell and two in the 3s subshell. All of these electrons are paired, so zero unpaired electrons. 
E) Cl has seven valence electrons, five in the 3p subshell and two in the 3s subshell. One of the 3p electrons is unpaired, so one unpaired electron.

Therefore, the answer is B) V, since it has one unpaired electron in the ground state.

Question 20

How many electrons are there in the 3^rd principal energy level (n = 3) of a phosphorus atom?

Accepted Answer

The 3rd principal energy level (n = 3) of a phosphorus atom includes the 3s and 3p sublevels. Phosphorus has an electron configuration of [Ne] 3s² 3p³, meaning there are 2 electrons in the 3s sublevel and 3 electrons in the 3p sublevel, totaling 5 electrons in the n = 3 level.

Quiz 6: Quantum Theory and the Electronic Structure of Atoms

Which is the correct electron configuration for gold?

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹4d¹⁰?

Which of the following subshells has the highest energy in the element tantalum?

What is the electron configuration for bromine?

How many electrons are in the 4p orbitals of selenium?

What is the electron configuration for tungsten?

How many electrons are in the 4p orbitals of vanadium?

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s¹3d⁵?

If one s orbital were combined with one p orbital (dumbbell shaped) , which would best describe the resulting shape?

Emission spectra

List the following types of radiation from lowest frequency to highest frequency: microwave, X ray, ultraviolet, visible, and infrared

What is the electron configuration for silicon?

What wavelength, in nm, can strike a metal surface and eject an electron with a kinetic energy of 1.89 × 10^-19 J if the binding energy of the metal is 289 kJ/mol?

An atom in its ground state contains 33 electrons. How many of these electrons are in p orbitals?

A 6.0-gram champagne cork is shot out of an opened champagne bottle and traveled at a speed of 65 km/hour. Calculate the de Broglie wavelength (in meters) of the cork.

De Broglie explained electron movements by relating them to

How many electrons are in the 4d orbitals of Tc?

How many electrons are there in the 2^nd principal energy level (n = 2) of a phosphorus atom?

Which of the following elements has the largest number of unpaired electrons in the ground state?

How many electrons are there in the 3^rd principal energy level (n = 3) of a phosphorus atom?

Quiz 6: Quantum Theory and the Electronic Structure of Atoms

Which is the correct electron configuration for gold?

What element is represented by the electron configuration 1s22s22p63s23p64s23d104p65s14d10?

Which of the following subshells has the highest energy in the element tantalum?

What is the electron configuration for bromine?

How many electrons are in the 4p orbitals of selenium?

What is the electron configuration for tungsten?

How many electrons are in the 4p orbitals of vanadium?

What element is represented by the electron configuration 1s22s22p63s23p64s13d5?

If one s orbital were combined with one p orbital (dumbbell shaped) , which would best describe the resulting shape?

Emission spectra

List the following types of radiation from lowest frequency to highest frequency: microwave, X ray, ultraviolet, visible, and infrared

What is the electron configuration for silicon?

What wavelength, in nm, can strike a metal surface and eject an electron with a kinetic energy of 1.89 × 10-19 J if the binding energy of the metal is 289 kJ/mol?

An atom in its ground state contains 33 electrons. How many of these electrons are in p orbitals?

A 6.0-gram champagne cork is shot out of an opened champagne bottle and traveled at a speed of 65 km/hour. Calculate the de Broglie wavelength (in meters) of the cork.

De Broglie explained electron movements by relating them to

How many electrons are in the 4d orbitals of Tc?

How many electrons are there in the 2nd principal energy level (n = 2) of a phosphorus atom?

Which of the following elements has the largest number of unpaired electrons in the ground state?

How many electrons are there in the 3rd principal energy level (n = 3) of a phosphorus atom?

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹4d¹⁰?

What element is represented by the electron configuration 1s²2s²2p⁶3s²3p⁶4s¹3d⁵?

What wavelength, in nm, can strike a metal surface and eject an electron with a kinetic energy of 1.89 × 10^-19 J if the binding energy of the metal is 289 kJ/mol?

How many electrons are there in the 2^nd principal energy level (n = 2) of a phosphorus atom?

How many electrons are there in the 3^rd principal energy level (n = 3) of a phosphorus atom?