Consider the following orderings. I. Al < Si < P < Cl II. Be < Mg < Ca < Sr III. I < Br < Cl < F IV. NaS1U1P1+S1S1P0 < MgS1U1P12+S1S1P0 < AlS1U1P13+S1S1P0 < SiS1U1P14+S1S1P0 -Which of the following statements is true of second ionization energies?

A) That of Al is higher than that of Mg because Mg wants to lose the second electron, so it is easier to take the second electron away. B) That of Al is lower than that of Mg because the second electron taken from Al is in a p orbital, so it is easier to take away. C) That of Al is lower than that of Mg because Mg wants to lose the second electron, so the energy change is greater. D) The second ionization energies are equal for Al and Mg. E) That of Al is higher than that of Mg because the electrons are taken from the same energy level, but the Al atom has one more proton. A) That of Al is higher than that of Mg because Mg wants to lose the second electron, so it is easier to take the second electron away. B) That of Al is lower than that of Mg because the second electron taken from Al is in a p orbital, so it is easier to take away. C) That of Al is lower than that of Mg because Mg wants to lose the second electron, so the energy change is greater. D) The second ionization energies are equal for Al and Mg. E) That of Al is higher than that of Mg because the electrons are taken from the same energy level, but the Al atom has one more proton.

Light has a wavelength of 5.6 × 102 nm. What is the energy of a photon of this light?

A) 2.53× 1018 J B) 3.95 × 10-20 J C) 1.24 × 10-18 J D) 1.18 × 10-19 J E) 3.55 × 10-19 J A) 2.53× 1018 J B) 3.95 × 10-20 J C) 1.24 × 10-18 J D) 1.18 × 10-19 J E) 3.55 × 10-19 J

What is the electron configuration of Co3+?

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

Exam 12: Quantum Mechanics and Atomic Theory

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -[Ar] 4s²3d⁷

(Essay)

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Question 61

Consider the following portion of the energy-level diagram for hydrogen: -What is the probability of finding a particle in a one-dimensional box in energy level n = 4 between x = L/4 and x = L/2? (L is the length of the box.)

(Multiple Choice)

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Question 62

In which groups do all the elements have the same number of valence electrons?

(Multiple Choice)

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Question 63

Write the electron configuration for the following: -Cu

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Question 64

From the following list of observations, choose the one that most clearly supports the conclusion that the mass of the atom is located mainly in the nucleus.

(Multiple Choice)

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Question 65

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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Question 66

What is the wavelength, in nanometers, of a photon of light whose frequency is 5.40 × 10¹⁴ Hz?

(Multiple Choice)

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Question 67

The energy equation for a particle in a cubic box of dimensions Lx = L_y = Lz is E_{nx, ny, nz} = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level.

(Short Answer)

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Question 68

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 the following statements is true of second ionization energies?

(Multiple Choice)

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Question 69

In an investigation of the electronic absorption spectrum of a particular element, it is found that a photon having λ = 500 nm provides just enough energy to promote an electron from the second quantum level to the third. From this information, we can deduce

(Multiple Choice)

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Question 70

The energy equation for a particle in a cubic box of dimensions Lx = L_y = Lz is Enx_, _{ny, nz} = For a particle in a cubic box, how many degenerate energy levels have energy equal to 14 h²/8 mL²?

(Multiple Choice)

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Question 71

Light has a wavelength of 5.6 × 10² nm. What is the energy of a photon of this light?

(Multiple Choice)

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Question 72

What is the electron configuration of Co³⁺?

(Multiple Choice)

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Question 73

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.

(Multiple Choice)

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Question 74

What is the electron configuration for the chromium atom?

(Multiple Choice)

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Question 75

Which orbital has the highest energy in the rubidium atom?

(Multiple Choice)

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Question 76

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.

(Multiple Choice)

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Question 77

How many unpaired electrons does chlorine have in its ground state?

(Multiple Choice)

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Question 78

Place the elements C, N, and O in order of increasing ionization energy.

(Multiple Choice)

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Question 79

How many electrons can be described by the quantum numbers n = 4, l = 3, m_l = 0?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 125

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -[Ar] 4s²3d⁷

Consider the following portion of the energy-level diagram for hydrogen: -What is the probability of finding a particle in a one-dimensional box in energy level n = 4 between x = L/4 and x = L/2? (L is the length of the box.)

In which groups do all the elements have the same number of valence electrons?

Write the electron configuration for the following: -Cu

From the following list of observations, choose the one that most clearly supports the conclusion that the mass of the atom is located mainly in the nucleus.

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

What is the wavelength, in nanometers, of a photon of light whose frequency is 5.40 × 10¹⁴ Hz?

The energy equation for a particle in a cubic box of dimensions Lx = L_y = Lz is E_{nx, ny, nz} = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level.

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 the following statements is true of second ionization energies?

In an investigation of the electronic absorption spectrum of a particular element, it is found that a photon having λ = 500 nm provides just enough energy to promote an electron from the second quantum level to the third. From this information, we can deduce

The energy equation for a particle in a cubic box of dimensions Lx = L_y = Lz is Enx_, _{ny, nz} = For a particle in a cubic box, how many degenerate energy levels have energy equal to 14 h²/8 mL²?

Light has a wavelength of 5.6 × 10² nm. What is the energy of a photon of this light?

What is the electron configuration of Co³⁺?

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.

What is the electron configuration for the chromium atom?

Which orbital has the highest energy in the rubidium atom?

How many unpaired electrons does chlorine have in its ground state?

Place the elements C, N, and O in order of increasing ionization energy.

How many electrons can be described by the quantum numbers n = 4, l = 3, m_l = 0?

Atoms, Molecules, and Ions

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Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Bonding: General Concepts

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Exam 12: Quantum Mechanics and Atomic Theory

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -[Ar] 4s23d7

Consider the following portion of the energy-level diagram for hydrogen: -What is the probability of finding a particle in a one-dimensional box in energy level n = 4 between x = L/4 and x = L/2? (L is the length of the box.)

In which groups do all the elements have the same number of valence electrons?

Write the electron configuration for the following: -Cu

From the following list of observations, choose the one that most clearly supports the conclusion that the mass of the atom is located mainly in the nucleus.

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

What is the wavelength, in nanometers, of a photon of light whose frequency is 5.40 × 1014 Hz?

The energy equation for a particle in a cubic box of dimensions Lx = Ly = Lz is Enx, ny, nz = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level.

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 the following statements is true of second ionization energies?

In an investigation of the electronic absorption spectrum of a particular element, it is found that a photon having λ = 500 nm provides just enough energy to promote an electron from the second quantum level to the third. From this information, we can deduce

The energy equation for a particle in a cubic box of dimensions Lx = Ly = Lz is Enx, ny, nz = For a particle in a cubic box, how many degenerate energy levels have energy equal to 14 h2/8 mL2?

Light has a wavelength of 5.6 × 102 nm. What is the energy of a photon of this light?

What is the electron configuration of Co3+?

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.

What is the electron configuration for the chromium atom?

Which orbital has the highest energy in the rubidium atom?

How many unpaired electrons does chlorine have in its ground state?

Place the elements C, N, and O in order of increasing ionization energy.

How many electrons can be described by the quantum numbers n = 4, l = 3, ml = 0?

Atoms, Molecules, and Ions

Stoichiometry

Types of Chemical Reactions and Solution Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Liquids and Solids

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

Given the electron configurations of the following neutral atoms, identify the element, and state the number of unpaired electrons in its ground state. -[Ar] 4s²3d⁷

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

What is the wavelength, in nanometers, of a photon of light whose frequency is 5.40 × 10¹⁴ Hz?

The energy equation for a particle in a cubic box of dimensions Lx = L_y = Lz is E_{nx, ny, nz} = Assume that 8 electrons occupy the allowed energy levels and that 2 electrons can occupy each allowed energy level.

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 the following statements is true of second ionization energies?

The energy equation for a particle in a cubic box of dimensions Lx = L_y = Lz is Enx_, _{ny, nz} = For a particle in a cubic box, how many degenerate energy levels have energy equal to 14 h²/8 mL²?

Light has a wavelength of 5.6 × 10² nm. What is the energy of a photon of this light?

What is the electron configuration of Co³⁺?

How many electrons can be described by the quantum numbers n = 4, l = 3, m_l = 0?