Question 1

Photons in a laser beam have the same energy, wavelength, polarization direction, and phase because:

Accepted Answer

A) each is produced in an emission that is stimulated by another 
B) all come from the same atom 
C) the lasing material has only two quantum states 
D) all photons are alike, no matter what their source 
E) none of the above 
A) each is produced in an emission that is stimulated by another 
B) all come from the same atom 
C) the lasing material has only two quantum states 
D) all photons are alike, no matter what their source 
E) none of the above

Question 2

The states being filled from the beginning to end of the lanthanide series of atoms are:

Accepted Answer

A) n = 3, ℓ=2 states 
B) n = 4, ℓ=1 states 
C) n = 4, ℓ=2 states 
D) n = 4, ℓ=3 states 
E) n = 5, ℓ=2 states 
A) n = 3, ℓ=2 states 
B) n = 4, ℓ=1 states 
C) n = 4, ℓ=2 states 
D) n = 4, ℓ=3 states 
E) n = 5, ℓ=2 states

Question 3

Two different electron beams are incident on two different targets and both produce x rays.The cutoff wavelength for target 1 is shorter than the cutoff wavelength for target 2.We can conclude that:

Accepted Answer

A) target 2 has a higher atomic number than target 1 
B) target 2 has a lower atomic number than target 1 
C) the electrons in beam 1 have greater kinetic energy than those in beam 2 
D) the electrons in beam 1 have less kinetic energy than those in beam 2 
E) target 1 is thicker than target 2 
A) target 2 has a higher atomic number than target 1 
B) target 2 has a lower atomic number than target 1 
C) the electrons in beam 1 have greater kinetic energy than those in beam 2 
D) the electrons in beam 1 have less kinetic energy than those in beam 2 
E) target 1 is thicker than target 2

Question 4

A photon with the smallest wavelength in the continuous z-ray spectrum is emitted when:

Accepted Answer

A) an electron is knocked from a K shell 
B) a valence electron is knocked from the atom 
C) the incident electron becomes bound to the atom 
D) the atom has the greatest recoil energy 
E) the incident electron loses all its energy in a single decelerating event 
A) an electron is knocked from a K shell 
B) a valence electron is knocked from the atom 
C) the incident electron becomes bound to the atom 
D) the atom has the greatest recoil energy 
E) the incident electron loses all its energy in a single decelerating event

Question 5

The group of atoms at the beginning of periods of the periodic table is called:

Accepted Answer

A) alkali metal atoms 
B) rare earth atoms 
C) transition metal atoms 
D) alkaline atoms 
E) noble gas atoms 
A) alkali metal atoms 
B) rare earth atoms 
C) transition metal atoms 
D) alkaline atoms 
E) noble gas atoms

Question 6

Hydrogen atoms are in a magnetic field of 2.0 T.What is their magnetic resonance frequency?

Accepted Answer

A) 2.8 x 1010 Hz 
B) 5.6 x 1010 Hz 
C) 1.1 x 1011 Hz 
D) 1.8 x 1011 Hz 
E) 3.5 x 1011 Hz 
A) 2.8 x 1010 Hz 
B) 5.6 x 1010 Hz 
C) 1.1 x 1011 Hz 
D) 1.8 x 1011 Hz 
E) 3.5 x 1011 Hz

Question 7

The number of states in a shell with principal quantum number n = 3 is:

Accepted Answer

A) 3 
B) 8 
C) 9 
D) 18 
E) 32 
A) 3 
B) 8 
C) 9 
D) 18 
E) 32

Question 8

In the relation µz=−mℓµB, the quantity $\mu$B is:

Accepted Answer

A) the Bohr magneton 
B) the component of the dipole moment along the magnetic field 
C) the permeability of the material 
D) a friction coefficient 
E) none of the above 
A) the Bohr magneton 
B) the component of the dipole moment along the magnetic field 
C) the permeability of the material 
D) a friction coefficient 
E) none of the above

Question 9

The electron states in an atom which constitute a single subshell all have:

Accepted Answer

A) only the same value of n 
B) only the same value of ℓ 
C) only the same value of n and the same value of ℓ 
D) only the same value of ℓ and the same value of mℓ 
E) the same set of all four quantum numbers 
A) only the same value of n 
B) only the same value of ℓ 
C) only the same value of n and the same value of ℓ 
D) only the same value of ℓ and the same value of mℓ 
E) the same set of all four quantum numbers

Question 10

In a helium-neon laser, the laser light arises from a transition from a _________ state to a _________ state:

Accepted Answer

A) He, He 
B) Ne, Ne 
C) He, Ne 
D) Ne, He 
E) N, He 
A) He, He 
B) Ne, Ne 
C) He, Ne 
D) Ne, He 
E) N, He

Question 11

The "e" in laser stands for:

Accepted Answer

A) electric 
B) emf 
C) energy 
D) emission 
E) entropy 
A) electric 
B) emf 
C) energy 
D) emission 
E) entropy

Question 12

An electron in an atom is in a state with principal quantum number n = 4.The possible values of the orbital quantum number ℓ are:

Accepted Answer

A) 1, 2, 3 
B) 1, 2, 3, 4 
C) -3, -2, -1, 0, 1, 2, 3 
D) 0, 1, 2, 3 
E) 0, 1, 2 
A) 1, 2, 3 
B) 1, 2, 3, 4 
C) -3, -2, -1, 0, 1, 2, 3 
D) 0, 1, 2, 3 
E) 0, 1, 2

Question 13

Five electrons are in a two-dimensional square potential energy well with sides of length L.The potential energy is infinite at the sides and zero inside.The single-particle energies are given by where nx and ny are integers.The energy of the first excited state of the system is:

Accepted Answer

A) 13 (h2/8mL2) 
B) 22 (h2/8mL2) 
C) 24 (h2/8mL2) 
D) 25 (h2/8mL2) 
E) 27 (h2/8mL2) 
A) 13 (h2/8mL2) 
B) 22 (h2/8mL2) 
C) 24 (h2/8mL2) 
D) 25 (h2/8mL2) 
E) 27 (h2/8mL2)

Question 14

The quantum number ms is most closely associated with what property of the electron in an atom?

Accepted Answer

A) Magnitude of the orbital angular momentum 
B) Energy 
C) z component of the spin angular momentum 
D) z component of the orbital angular momentum 
E) Radius of the orbit 
A) Magnitude of the orbital angular momentum 
B) Energy 
C) z component of the spin angular momentum 
D) z component of the orbital angular momentum 
E) Radius of the orbit

Question 15

Radiation with the minimum wavelength as well as the K x-ray lines are detected for a certain target.The energy of the incident electrons is then doubled, with the result that:

Accepted Answer

A) the minimum wavelength increases and the wavelengths of the K lines remain the same 
B) the minimum wavelength decreases and the wavelengths of the K lines remain the same 
C) the minimum wavelength and the wavelengths of the K lines all increase 
D) the minimum wavelength and the wavelengths of the K lines all decrease 
E) the minimum wavelength increases and the wavelengths of the K lines all decrease 
A) the minimum wavelength increases and the wavelengths of the K lines remain the same 
B) the minimum wavelength decreases and the wavelengths of the K lines remain the same 
C) the minimum wavelength and the wavelengths of the K lines all increase 
D) the minimum wavelength and the wavelengths of the K lines all decrease 
E) the minimum wavelength increases and the wavelengths of the K lines all decrease

Question 16

In calculating the x-ray energy levels the effective charge of the nucleus is taken to be Z - b, where Z is the atomic number.The parameter b enters because:

Accepted Answer

A) an electron is removed from the inner shell 
B) a proton is removed from the nucleus 
C) the quantum mechanical force between two charges is less than the classical force 
D) the nucleus is screened by electrons 
E) the Pauli exclusion principle must be obeyed 
A) an electron is removed from the inner shell 
B) a proton is removed from the nucleus 
C) the quantum mechanical force between two charges is less than the classical force 
D) the nucleus is screened by electrons 
E) the Pauli exclusion principle must be obeyed

Question 17

Space quantization means that:

Accepted Answer

A) space is quantized 
B) Lz can have only certain discrete values 
C) and are in the same direction 
D) and are in opposite directions 
E) an electron has a magnetic dipole moment 
A) space is quantized 
B) Lz can have only certain discrete values 
C) and are in the same direction 
D) and are in opposite directions 
E) an electron has a magnetic dipole moment

Question 18

The most energetic electron in any atom at the beginning of a period of the periodic table is in:

Accepted Answer

A) an ℓ=0 state 
B) an ℓ=1 state 
C) an ℓ=2 state 
D) an n = 0 state with unspecified angular momentum 
E) an n = 1 state with unspecified angular momentum 
A) an ℓ=0 state 
B) an ℓ=1 state 
C) an ℓ=2 state 
D) an n = 0 state with unspecified angular momentum 
E) an n = 1 state with unspecified angular momentum

Question 19

The Einstein-de Haas experiment showed that:

Accepted Answer

A) atoms emit and absorb light, but only of certain wavelengths. 
B) atoms have momentum, and momentum is conserved. 
C) atoms have electric fields, and electric fields can cause their energy levels to split. 
D) atoms have magnetic dipole moments that are coupled to their angular momentum. 
E) a gradient in a magnetic field will cause a beam of atoms to split. 
A) atoms emit and absorb light, but only of certain wavelengths. 
B) atoms have momentum, and momentum is conserved. 
C) atoms have electric fields, and electric fields can cause their energy levels to split. 
D) atoms have magnetic dipole moments that are coupled to their angular momentum. 
E) a gradient in a magnetic field will cause a beam of atoms to split.

Question 20

If electrons did not have intrinsic angular momentum (spin)but still obeyed the Pauli exclusion principle the states occupied by electrons in the ground state of helium would be:

Accepted Answer

A) (n = 1, ℓ=0); (n = 1, ℓ=0) 
B) (n = 1, ℓ=0); (n = 1, ℓ=1) 
C) (n = 1, ℓ=0); (n = 2, ℓ=0) 
D) (n = 2, ℓ=0); (n = 2, ℓ=1) 
E) (n = 2, ℓ=1); (n = 2, ℓ=1) 
A) (n = 1, ℓ=0); (n = 1, ℓ=0) 
B) (n = 1, ℓ=0); (n = 1, ℓ=1) 
C) (n = 1, ℓ=0); (n = 2, ℓ=0) 
D) (n = 2, ℓ=0); (n = 2, ℓ=1) 
E) (n = 2, ℓ=1); (n = 2, ℓ=1)

Exam 40: All About Atoms

Photons in a laser beam have the same energy, wavelength, polarization direction, and phase because:

The states being filled from the beginning to end of the lanthanide series of atoms are:

Two different electron beams are incident on two different targets and both produce x rays.The cutoff wavelength for target 1 is shorter than the cutoff wavelength for target 2.We can conclude that:

A photon with the smallest wavelength in the continuous z-ray spectrum is emitted when:

The group of atoms at the beginning of periods of the periodic table is called:

Hydrogen atoms are in a magnetic field of 2.0 T.What is their magnetic resonance frequency?

The number of states in a shell with principal quantum number n = 3 is:

In the relation µz=−mℓµB, the quantity μ\muμ B is:

The electron states in an atom which constitute a single subshell all have:

In a helium-neon laser, the laser light arises from a transition from a _________ state to a _________ state:

The "e" in laser stands for:

An electron in an atom is in a state with principal quantum number n = 4.The possible values of the orbital quantum number ℓ are:

Five electrons are in a two-dimensional square potential energy well with sides of length L.The potential energy is infinite at the sides and zero inside.The single-particle energies are given by where nx and ny are integers.The energy of the first excited state of the system is:

The quantum number ms is most closely associated with what property of the electron in an atom?

Radiation with the minimum wavelength as well as the K x-ray lines are detected for a certain target.The energy of the incident electrons is then doubled, with the result that:

In calculating the x-ray energy levels the effective charge of the nucleus is taken to be Z - b, where Z is the atomic number.The parameter b enters because:

Space quantization means that:

The most energetic electron in any atom at the beginning of a period of the periodic table is in:

The Einstein-de Haas experiment showed that:

If electrons did not have intrinsic angular momentum (spin)but still obeyed the Pauli exclusion principle the states occupied by electrons in the ground state of helium would be:

Measurement

Motion Along a Straight Line

Vector

Motion in Two and Three Dimensions

Force and Motion I

Force and Motion II

Kinetic Energy and Work

Potential Energy and Conservation of Energy

Center of Mass and Linear Momentum

Rotation

Rolling, Torque, and Angular Momentum

Equilibrium and Elasticity

Gravitation

Fluids

Oscillations

Waves I

Waves II

Temperature, Heat, and the First Law of Thermodynamics

The Kinetic Theory of Gases

Entropy and the Second Law of Thermodynamics

Electric Charge

Electric Fields

Gauss Law

Electric Potential

Capacitance

Current and Resistance

Circuits

Magnetic Fields

Magnetic Fields Due to Currents

Induction and Inductance

Electromagnetic Oscillations and Alternating Current

Maxwells Equations; Magnetism of Matter

Electromagnetic Waves

Images

Interference

Diffraction

Relativity

Photons and Matter Waves

More About Matter Waves

Conduction of Electricity in Solids

Nuclear Physics

Energy From the Nucleus

Quarks, Leptons, and the Big Bang

Filters

In the relation µ_z=−m_ℓµ_B, the quantity $\mu$ _B is:

In a helium-neon laser, the laser light arises from a transition from a _ state to a _ state:

Five electrons are in a two-dimensional square potential energy well with sides of length L.The potential energy is infinite at the sides and zero inside.The single-particle energies are given by where n_x and n_y are integers.The energy of the first excited state of the system is:

The quantum number m_s is most closely associated with what property of the electron in an atom?