Question 1

The ratio of wavelength of K $\infty$  x-ray line for Nb (Z = 41)to that of Ga (Z = 31)is:

Accepted Answer

A) 9/16 
B) 16/9 
C) 3/4 
D) 4/3 
E) 1.15 
A) 9/16 
B) 16/9 
C) 3/4 
D) 4/3 
E) 1.15

Question 2

In a Moseley graph:

Accepted Answer

A) the x-ray frequency is plotted as a function of atomic number 
B) the square of the x-ray frequency is plotted as a function of atomic number 
C) the square root of the x-ray frequency is plotted as a function of atomic number 
D) the x-ray frequency is plotted as a function of the square root of atomic number 
E) the square root of the x-ray frequency is plotted as a function of atomic mass 
A) the x-ray frequency is plotted as a function of atomic number 
B) the square of the x-ray frequency is plotted as a function of atomic number 
C) the square root of the x-ray frequency is plotted as a function of atomic number 
D) the x-ray frequency is plotted as a function of the square root of atomic number 
E) the square root of the x-ray frequency is plotted as a function of atomic mass

Question 3

The magnetic field   is along the z axis in a Stern-Gerlach experiment.The force it exerts on a magnetic dipole with dipole moment   is proportional to:

Accepted Answer

A)  " " 
B) "B2" 
C) "dB/dz" 
D) "d2B/dz2" 
E)   
A)  " " 
B) "B2" 
C) "dB/dz" 
D) "d2B/dz2" 
E)

Question 4

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 5

The group of atoms at the ends 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

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 7

An atom is in a state with orbital quantum number ℓ=2.Possible values of the magnetic quantum number mℓ are:

Accepted Answer

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

Question 8

A group of electromagnetic waves might   Which of these describe the waves from a laser?

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II only 
E) I, II, and III 
A) I only 
B) II only 
C) III only 
D) I and II only 
E) I, II, and III

Question 9

The Pauli exclusion principle is obeyed by:

Accepted Answer

A) all particles 
B) all charged particles 
C) all particles with spin quantum numbers of 1/2 
D) all particles with spin quantum numbers of 1 
E) all particles with mass 
A) all particles 
B) all charged particles 
C) all particles with spin quantum numbers of 1/2 
D) all particles with spin quantum numbers of 1 
E) all particles with mass

Question 10

The magnitude of the orbital angular momentum of an electron is what multiple of   ? (ℓ is a positive integer.)

Accepted Answer

A) 1 
B) 1/2 
C)    
D) 2ℓ+1 
E) ℓ2 
A) 1 
B) 1/2 
C)    
D) 2ℓ+1 
E) ℓ2

Question 11

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 12

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 13

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 14

The number of possible values of the magnetic quantum number mℓ associated with a given value of the orbital quantum number ℓ is:

Accepted Answer

A) 1 
B) 2 
C) ℓ 
D) 2 ℓ 
E) 2 ℓ +1 
A) 1 
B) 2 
C) ℓ 
D) 2 ℓ 
E) 2 ℓ +1

Question 15

The total number of electron states with n = 2 and ℓ=1 for an atom is:

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
E) 10 
A) 2 
B) 4 
C) 6 
D) 8 
E) 10

Question 16

The number of states in a subshell with orbital quantum number ℓ=3 is:

Accepted Answer

A) 2 
B) 3 
C) 7 
D) 9 
E) 14 
A) 2 
B) 3 
C) 7 
D) 9 
E) 14

Question 17

The purpose of the mirrors at the ends of a helium-neon laser is:

Accepted Answer

A) to assure that no laser light leaks out 
B) to increase the number of stimulated emissions 
C) to absorb some of the photons 
D) to keep the light used for pumping inside the laser 
E) to double the effective length of the laser 
A) to assure that no laser light leaks out 
B) to increase the number of stimulated emissions 
C) to absorb some of the photons 
D) to keep the light used for pumping inside the laser 
E) to double the effective length of the laser

Question 18

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

Accepted Answer

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

Question 19

In the relation µz=-m$\mu$µB, 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 20

The most energetic photon in a continuous x-ray spectrum has an energy approximately equal to:

Accepted Answer

A) the energy of all the electrons in a target atom 
B) the kinetic energy of an incident-beam electron 
C) the rest energy, mc2, of an electron 
D) the total energy of a K-electron in the target atom 
E) the kinetic energy of a K-electron in the target atom 
A) the energy of all the electrons in a target atom 
B) the kinetic energy of an incident-beam electron 
C) the rest energy, mc2, of an electron 
D) the total energy of a K-electron in the target atom 
E) the kinetic energy of a K-electron in the target atom

Exam 40: All About Atoms

The ratio of wavelength of K ∞\infty∞ x-ray line for Nb (Z = 41)to that of Ga (Z = 31)is:

In a Moseley graph:

The magnetic field is along the z axis in a Stern-Gerlach experiment.The force it exerts on a magnetic dipole with dipole moment is proportional to:

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

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

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:

An atom is in a state with orbital quantum number ℓ=2.Possible values of the magnetic quantum number mℓ are:

A group of electromagnetic waves might Which of these describe the waves from a laser?

The Pauli exclusion principle is obeyed by:

The magnitude of the orbital angular momentum of an electron is what multiple of ? (ℓ is a positive integer.)

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:

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:

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

The number of possible values of the magnetic quantum number mℓ associated with a given value of the orbital quantum number ℓ is:

The total number of electron states with n = 2 and ℓ=1 for an atom is:

The number of states in a subshell with orbital quantum number ℓ=3 is:

The purpose of the mirrors at the ends of a helium-neon laser is:

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

In the relation µz=-m μ\muμ µB, the quantity μ\muμ B is:

The most energetic photon in a continuous x-ray spectrum has an energy approximately equal to:

Measurement

Motion Along a Straight Line

Vectors

Motion in Two and Three Dimensions

Force and Motion

Force and Motion

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

Waves

Temperature, Heat, and the First Law of Thermodynamics

The Kinetic Theory of Gases

Entropy and the Second Law of Thermodynamics

Coulombs Law

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 1

Diffraction

Relativity

Photons and Matter Waves

More About Matter Waves

Conduction of Electricity in Solids

Energy From the Nucleus

Quarks, Leptons, and the Big Bang

Filters

The ratio of wavelength of K _$\infty$ x-ray line for Nb (Z = 41)to that of Ga (Z = 31)is:

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

An atom is in a state with orbital quantum number ℓ=2.Possible values of the magnetic quantum number m_ℓ are:

The number of possible values of the magnetic quantum number m_ℓ associated with a given value of the orbital quantum number ℓ is:

In the relation µ_z=-m_$\mu$µ_B, the quantity $\mu$ _B is: