Question 1

The number of electrons required to fill all the energy levels for a shell having principal quantum number n is

Accepted Answer

A) n 
B) n+1 
C) 2n 
D) n2 
E) 2n2 
A) n 
B) n+1 
C) 2n 
D) n2 
E) 2n2

Question 2

What is the energy of one mole of photons associated with radiation that has a frequency of 6.336 × 1015 Hz?

Accepted Answer

A) 2.528 × 106 J 
B) 3.882 × 1014 J 
C) 3.955 × 10-7 J 
D) 4.198 × 10-18 J 
E) 6.298 × 10-26 J 
A) 2.528 × 106 J 
B) 3.882 × 1014 J 
C) 3.955 × 10-7 J 
D) 4.198 × 10-18 J 
E) 6.298 × 10-26 J

Question 3

Atomic hydrogen has a single electron, and therefore its emission contains only one line.

Accepted Answer

A) True 
 B)False

Question 4

What is the maximum number of electrons that can fill all the orbitals of an f subshell?

Accepted Answer

A) 6 
B) 8 
C) 10 
D) 12 
E) 14 
A) 6 
B) 8 
C) 10 
D) 12 
E) 14

Question 5

What is the wavelength of electromagnetic radiation which has a frequency of 6.282 × 1014 s-1?

Accepted Answer

A) 1.883 × 1023 m 
B) 2.095 × 106 m 
C) 4.776 × 10-7 m 
D) 4.776 × 10-7 nm 
E) 530.9 nm 
A) 1.883 × 1023 m 
B) 2.095 × 106 m 
C) 4.776 × 10-7 m 
D) 4.776 × 10-7 nm 
E) 530.9 nm

Question 6

An electron with an n = 3 quantum number may also have a quantum number l = 0.

Accepted Answer

A) True 
 B)False

Question 7

Which atom would have the largest effective nuclear charge for its valence electrons?

Accepted Answer

A) Li 
B) Be 
C) B 
D) C 
E) N 
A) Li 
B) Be 
C) B 
D) C 
E) N

Question 8

A hydrogen atom starts in the n = 1 energy level. What energy level would the atom end up in if it were to absorb 2.093 × 10-18 J of energy?Hint: Make sure to convert energy to wavelength for your calculations.

Accepted Answer

A) n = 2 
B) n = 3 
C) n = 4 
D) n = 5 
E) n = 6 
A) n = 2 
B) n = 3 
C) n = 4 
D) n = 5 
E) n = 6

Question 9

What is the wavelength of electromagnetic radiation which has a frequency of 5.732 × 1014 s-1?

Accepted Answer

A) 1.718 × 1023 m 
B) 1.912 × 106 m 
C) 5.234 × 10-7 m 
D) 523.4 m 
E) 5.819 × 10-15 nm 
A) 1.718 × 1023 m 
B) 1.912 × 106 m 
C) 5.234 × 10-7 m 
D) 523.4 m 
E) 5.819 × 10-15 nm

Question 10

Bohr's theory was not able to adequately explain the spectra of atoms containing two or more electrons.

Accepted Answer

A) True 
 B)False

Question 11

Which one of the atoms in the set [Sr, Hf, Hg, Ga, Cr, Fr, Sn] would you expect to have the largest atomic radius?

Accepted Answer

The answer of Which one of the atoms in the...

Question 12

What is the wavelength of a single oxygen molecule traveling at a speed of 1165.7 miles per hour?Hint: Convert your units. 1 mile = 1609.34 meters.

Accepted Answer

A) 1.080 pm 
B) 23.94 pm 
C) 102.9 pm 
D) 65.77 pm 
E) 48.23 pm 
A) 1.080 pm 
B) 23.94 pm 
C) 102.9 pm 
D) 65.77 pm 
E) 48.23 pm

Question 13

When one thinks of the size of an atom as being determined by the region occupied by the electron cloud for the outermost electrons, its "radius"can be imagined. Typically, for an atom this "radius"would be about

Accepted Answer

A) 2 picometers 
B) 20 picometers 
C) 200 picometers 
D) 2 nanometers 
E) 20 nanometers 
A) 2 picometers 
B) 20 picometers 
C) 200 picometers 
D) 2 nanometers 
E) 20 nanometers

Question 14

Which placement of electrons is never encountered in the ground state configuration of an atom?

Accepted Answer

A) 3d4 with 2 unpaired electrons 
B) 3d7 with 3 unpaired electrons 
C) 3p1 with 1 unpaired electron 
D) 3d8 with 2 unpaired electrons 
E) 4d7 with 3 unpaired electrons 
A) 3d4 with 2 unpaired electrons 
B) 3d7 with 3 unpaired electrons 
C) 3p1 with 1 unpaired electron 
D) 3d8 with 2 unpaired electrons 
E) 4d7 with 3 unpaired electrons

Question 15

How many completely filled subshells are there in the ground state configuration for a calcium atom?

Accepted Answer

The answer of How many completely filled subshells are there...

Question 16

What is the frequency of radiation which has an energy of 3.371 × 10-19 joules per photon?

Accepted Answer

A) 1.697 × 1015 s-1 
B) 5.893 × 10-7 s-1 
C) 5.087 × 1014 s-1 
D) 1.966 × 10-15 s-1 
E) 6.626 × 10-34 s-1 
A) 1.697 × 1015 s-1 
B) 5.893 × 10-7 s-1 
C) 5.087 × 1014 s-1 
D) 1.966 × 10-15 s-1 
E) 6.626 × 10-34 s-1

Question 17

How many orbitals are in the shell in which the principal quantum number, n = 4?

Accepted Answer

A) 2 
B) 8 
C) 16 
D) 32 
E) 50 
A) 2 
B) 8 
C) 16 
D) 32 
E) 50

Question 18

Calculate the energy required to excite a hydrogen atom by causing an electronic transition from the energy level with n = 1 to the level with n = 4. Recall that the quantized energies of the levels in the hydrogen atom are given by:

Accepted Answer

A) 2.02 × 10-29 J 
B) 2.04 × 10-18 J 
C) 2.19 × 105 J 
D) 2.25 × 10-18 J 
E) 3.27 × 10-17 J 
A) 2.02 × 10-29 J 
B) 2.04 × 10-18 J 
C) 2.19 × 105 J 
D) 2.25 × 10-18 J 
E) 3.27 × 10-17 J

Question 19

The ground-state of ________ has an electron configuration described by the following orbital diagram. [Ar] 4s2 3d10 4p4

Accepted Answer

Question 20

Which statement correctly summarizes allowed values of quantum numbers in atoms?

Accepted Answer

A) All of the quantum numbers are allowed to have values which are not integers. 
B) Only the principal quantum number is allowed to have values which are not integers. 
C) Only the spin quantum numbers are allowed to have values which are not integers. 
D) Only the secondary quantum number is allowed to have values which are not integers. 
E) No quantum numbers are allowed to have values which are not integers. 
A) All of the quantum numbers are allowed to have values which are not integers. 
B) Only the principal quantum number is allowed to have values which are not integers. 
C) Only the spin quantum numbers are allowed to have values which are not integers. 
D) Only the secondary quantum number is allowed to have values which are not integers. 
E) No quantum numbers are allowed to have values which are not integers.

Exam 8: The Quantum Mechanical Atom

The number of electrons required to fill all the energy levels for a shell having principal quantum number n is

What is the energy of one mole of photons associated with radiation that has a frequency of 6.336 × 1015 Hz?

Atomic hydrogen has a single electron, and therefore its emission contains only one line.

What is the maximum number of electrons that can fill all the orbitals of an f subshell?

What is the wavelength of electromagnetic radiation which has a frequency of 6.282 × 1014 s-1?

An electron with an n = 3 quantum number may also have a quantum number l = 0.

Which atom would have the largest effective nuclear charge for its valence electrons?

A hydrogen atom starts in the n = 1 energy level. What energy level would the atom end up in if it were to absorb 2.093 × 10-18 J of energy?Hint: Make sure to convert energy to wavelength for your calculations.

What is the wavelength of electromagnetic radiation which has a frequency of 5.732 × 1014 s-1?

Bohr's theory was not able to adequately explain the spectra of atoms containing two or more electrons.

Which one of the atoms in the set [Sr, Hf, Hg, Ga, Cr, Fr, Sn] would you expect to have the largest atomic radius?

What is the wavelength of a single oxygen molecule traveling at a speed of 1165.7 miles per hour?Hint: Convert your units. 1 mile = 1609.34 meters.

When one thinks of the size of an atom as being determined by the region occupied by the electron cloud for the outermost electrons, its "radius"can be imagined. Typically, for an atom this "radius"would be about

Which placement of electrons is never encountered in the ground state configuration of an atom?

How many completely filled subshells are there in the ground state configuration for a calcium atom?

What is the frequency of radiation which has an energy of 3.371 × 10-19 joules per photon?

How many orbitals are in the shell in which the principal quantum number, n = 4?

Calculate the energy required to excite a hydrogen atom by causing an electronic transition from the energy level with n = 1 to the level with n = 4. Recall that the quantized energies of the levels in the hydrogen atom are given by:

The ground-state of ________ has an electron configuration described by the following orbital diagram. [Ar] 4s2 3d10 4p4

Which statement correctly summarizes allowed values of quantum numbers in atoms?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

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What is the energy of one mole of photons associated with radiation that has a frequency of 6.336 × 10¹⁵ Hz?

What is the wavelength of electromagnetic radiation which has a frequency of 6.282 × 10¹⁴ s^-¹?

A hydrogen atom starts in the n = 1 energy level. What energy level would the atom end up in if it were to absorb 2.093 × 10^-¹⁸ J of energy?Hint: Make sure to convert energy to wavelength for your calculations.

What is the wavelength of electromagnetic radiation which has a frequency of 5.732 × 10¹⁴ s^-¹?

What is the frequency of radiation which has an energy of 3.371 × 10^-19 joules per photon?

The ground-state of ________ has an electron configuration described by the following orbital diagram. [Ar] 4s²3d¹⁰4p⁴