Question 1

How fast is the electron moving in the first Bohr orbit?

Accepted Answer

A) 3.3 × 106 m/s 
B) 2.2 × 106 m/s 
C) 4.4 × 106 m/s 
D) 5.5 × 106 m/s 
E) 5.5 × 1015 m/s 
A) 3.3 × 106 m/s 
B) 2.2 × 106 m/s 
C) 4.4 × 106 m/s 
D) 5.5 × 106 m/s 
E) 5.5 × 1015 m/s B

Question 2

All quantum states forming a sub-shell have the same

Accepted Answer

A) principal quantum number n. 
B) orbital quantum number   . 
C) orbital magnetic quantum number   . 
D) n,   and   
E) n and   only. 
A) principal quantum number n. 
B) orbital quantum number   . 
C) orbital magnetic quantum number   . 
D) n,   and   
E) n and   only. E

Question 3

The ground state configuration of chlorine (Z = 17)is

Accepted Answer

A) 1s2 2s2 2p5 3s2 3p6 
B) 1s2 2s2 2p6 3s2 3p5 
C) 1s2 2s2 2p6 3s2 3p4 3d1 
D) 1s2 2s2 2p6 3s2 3p5 4s1 
E) 1s2 2s2 2p6 3s1 3p7 
A) 1s2 2s2 2p5 3s2 3p6 
B) 1s2 2s2 2p6 3s2 3p5 
C) 1s2 2s2 2p6 3s2 3p4 3d1 
D) 1s2 2s2 2p6 3s2 3p5 4s1 
E) 1s2 2s2 2p6 3s1 3p7 B

Question 4

The K,L,M symbols represent values of the quantum number

Accepted Answer

A) n 
B)    
C)    
D) ms 
E) mj 
A) n 
B)    
C)    
D) ms 
E) mj

Question 5

Suppose a beam of electrons is incident on a collection of hydrogen atoms,all of which are in the lowest energy state (n = 1).What is the minimum energy the electrons can have if they are to excite the hydrogen atoms into the n = 2 state?

Accepted Answer

The answer of Suppose a beam of electrons is incident...

Question 6

An electron is moving at a speed of 2.1 × 106 m/s in the first Bohr orbit.Determine its de Broglie wavelength.

Accepted Answer

A) 0.30 × 10−10 m 
B) 1.7 × 10−10 m 
C) 0.50 × 10−10 m 
D) 3.5 × 10−10 m 
E) 1.5 × 10−10 m 
A) 0.30 × 10−10 m 
B) 1.7 × 10−10 m 
C) 0.50 × 10−10 m 
D) 3.5 × 10−10 m 
E) 1.5 × 10−10 m

Question 7

Light is emitted by hydrogen atoms in the visible range for a hydrogen atom.Its wavelength is 656 nm.What value of n is associated with the light? (RH = 1.097 × 107 m−1)

Accepted Answer

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

Question 8

The energy difference between the upper and lower levels in a certain laser is 1.9593 eV.What is the wavelength of the light emitted by the laser?

Accepted Answer

The answer of The energy difference between the upper and...

Question 9

Zeke says that the magnitude of the orbital angular momentum in the hydrogen atom has the value L =  
)Ruth says that the maximum magnitude of the projection of the angular momentum along the direction of a constant magnetic field vector  
Is  
)Which one,if either,is correct,and why?

Accepted Answer

A) Ruth,because the maximum value of L is   . 
B) Ruth,because the orbital angular momentum always lines up with a magnetic field so that   has its maximum value along the field. 
C) Zeke,because the maximum magnitude of   is L =   . 
D) Zeke,because the orbital angular momentum always lines up with a magnetic field so that   has its maximum value along the field. 
E) Neither,because they have interchanged the maximum magnitude of   ,   ,and   ,its maximum projection along a magnetic field direction. 
A) Ruth,because the maximum value of L is   . 
B) Ruth,because the orbital angular momentum always lines up with a magnetic field so that   has its maximum value along the field. 
C) Zeke,because the maximum magnitude of   is L =   . 
D) Zeke,because the orbital angular momentum always lines up with a magnetic field so that   has its maximum value along the field. 
E) Neither,because they have interchanged the maximum magnitude of   ,   ,and   ,its maximum projection along a magnetic field direction.

Question 10

Suppose Bohr had chosen the potential energy of the electron in the hydrogen atom to be V = 0 when the electron is in the orbit with n = 1.He could do this by

Accepted Answer

A) choosing n = 1 for the orbit where the kinetic energy of the electron is zero. 
B) adding a constant 13.6 eV to the potential energy for all values of n. 
C) adding a constant 27.2 eV to the potential energy for all values of n. 
D) subtracting a constant 13.6 eV from the potential energy for all values of n. 
E) subtracting a constant 27.2 eV from the potential energy for all values of n. 
A) choosing n = 1 for the orbit where the kinetic energy of the electron is zero. 
B) adding a constant 13.6 eV to the potential energy for all values of n. 
C) adding a constant 27.2 eV to the potential energy for all values of n. 
D) subtracting a constant 13.6 eV from the potential energy for all values of n. 
E) subtracting a constant 27.2 eV from the potential energy for all values of n.

Question 11

An electron in a hydrogen atom makes a transition from the n = 3 to the n = 1 energy state.Determine the wavelength of the emitted photon (in nm).

Accepted Answer

A) 1006 
B) 209 
C) 306 
D) 103 
E) 821 
A) 1006 
B) 209 
C) 306 
D) 103 
E) 821

Question 12

In the subshell of the Li2+ ion with orbital quantum number  
,the allowed values of the magnetic quantum number  
Are

Accepted Answer

A) −   to   
B) −(   + 1)to (   + l) 
C) −(   + 2)to (   + 2) 
D) −(   + 3)to (   + 3) 
E) 0 to n − 1 
A) −   to   
B) −(   + 1)to (   + l) 
C) −(   + 2)to (   + 2) 
D) −(   + 3)to (   + 3) 
E) 0 to n − 1

Question 13

When electrons fill a subshell in which the orbitals have equal energy,the order in which the orbitals are filled is such that

Accepted Answer

A) a minimum number of electrons has unpaired spins. 
B) a minimum number of electrons has intrinsic angular momentum. 
C) a maximum number of electrons has unpaired spins. 
D) a maximum number of electrons first fills the next energy level. 
E) the maximum number of electrons has the same set of quantum numbers. 
A) a minimum number of electrons has unpaired spins. 
B) a minimum number of electrons has intrinsic angular momentum. 
C) a maximum number of electrons has unpaired spins. 
D) a maximum number of electrons first fills the next energy level. 
E) the maximum number of electrons has the same set of quantum numbers.

Question 14

The s,p,d,f,symbols represent values of the quantum number

Accepted Answer

A) ms 
B) n 
C)    
D)    
E) mj 
A) ms 
B) n 
C)    
D)    
E) mj

Question 15

In a completely filled atomic shell,

Accepted Answer

A) the intrinsic spin of the electrons does not produce a resultant magnetic moment. 
B) the orbital motion of the electrons does not produce a resultant magnetic moment. 
C) the atom will be an alkali metal. 
D) only (a)and (b)are correct. 
E) none of the above are correct. 
A) the intrinsic spin of the electrons does not produce a resultant magnetic moment. 
B) the orbital motion of the electrons does not produce a resultant magnetic moment. 
C) the atom will be an alkali metal. 
D) only (a)and (b)are correct. 
E) none of the above are correct.

Question 16

All quantum states forming a shell have the same

Accepted Answer

A) principal quantum number n. 
B) orbital quantum number   . 
C) orbital magnetic quantum number   . 
D) n,   and   
E) n and   only. 
A) principal quantum number n. 
B) orbital quantum number   . 
C) orbital magnetic quantum number   . 
D) n,   and   
E) n and   only.

Question 17

The allowed values of  
For the n = 3 shell in a Li2+ ion are

Accepted Answer

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

Question 18

Of the following states,5s,3p,4f,5p,4g,3d,and 2p,the one which is NOT allowed is

Accepted Answer

A) 3p 
B) 4f 
C) 3d 
D) 4g 
E) 2p 
A) 3p 
B) 4f 
C) 3d 
D) 4g 
E) 2p

Question 19

A hydrogen atom is in its first excited state (n = 2).The linear momentum of the electron is (in kg ⋅ m/s)

Accepted Answer

A) 3 × 10−24 
B) 2 × 10−24 
C) 1 × 10−24 
D) 4 × 10−24 
E) 3 × 10−15 
A) 3 × 10−24 
B) 2 × 10−24 
C) 1 × 10−24 
D) 4 × 10−24 
E) 3 × 10−15

Question 20

Adam and Eve are contemplating the beauty of the hydrogen atom.Adam claims that the quantum states with a given value of the principal quantum number n can have any value of the orbital quantum number  
)Eve says that the Snake told her that a state with a given value of  
Could have any value of n.Which one,if either,is correct,and why?

Accepted Answer

A) Adam,because the man is always right. 
B) Adam because n ≤   − 1. 
C) Eve,because n ≤   − 1. 
D) Eve,because   ≤ n − 1. 
E) Neither,because Adam is wrong and the Snake told a subtle lie. 
A) Adam,because the man is always right. 
B) Adam because n ≤   − 1. 
C) Eve,because n ≤   − 1. 
D) Eve,because   ≤ n − 1. 
E) Neither,because Adam is wrong and the Snake told a subtle lie.

Exam 42: Atomic Physics

How fast is the electron moving in the first Bohr orbit?

All quantum states forming a sub-shell have the same

The ground state configuration of chlorine (Z = 17)is

The K,L,M symbols represent values of the quantum number

Suppose a beam of electrons is incident on a collection of hydrogen atoms,all of which are in the lowest energy state (n = 1).What is the minimum energy the electrons can have if they are to excite the hydrogen atoms into the n = 2 state?

An electron is moving at a speed of 2.1 × 106 m/s in the first Bohr orbit.Determine its de Broglie wavelength.

Light is emitted by hydrogen atoms in the visible range for a hydrogen atom.Its wavelength is 656 nm.What value of n is associated with the light? (RH = 1.097 × 107 m−1)

The energy difference between the upper and lower levels in a certain laser is 1.9593 eV.What is the wavelength of the light emitted by the laser?

Zeke says that the magnitude of the orbital angular momentum in the hydrogen atom has the value L = )Ruth says that the maximum magnitude of the projection of the angular momentum along the direction of a constant magnetic field vector Is )Which one,if either,is correct,and why?

Suppose Bohr had chosen the potential energy of the electron in the hydrogen atom to be V = 0 when the electron is in the orbit with n = 1.He could do this by

An electron in a hydrogen atom makes a transition from the n = 3 to the n = 1 energy state.Determine the wavelength of the emitted photon (in nm).

In the subshell of the Li2+ ion with orbital quantum number ,the allowed values of the magnetic quantum number Are

When electrons fill a subshell in which the orbitals have equal energy,the order in which the orbitals are filled is such that

The s,p,d,f,symbols represent values of the quantum number

In a completely filled atomic shell,

All quantum states forming a shell have the same

The allowed values of For the n = 3 shell in a Li2+ ion are

Of the following states,5s,3p,4f,5p,4g,3d,and 2p,the one which is NOT allowed is

A hydrogen atom is in its first excited state (n = 2).The linear momentum of the electron is (in kg ⋅ m/s)

Physics and Measurement

Motion in One Dimension

Vectors

Motion in Two Dimensions

The Laws of Motion

Circular Motion and Other Applications of Newtons Laws

Energy of a System

Conservation of Energy

Linear Momentum and Collisions

Rotation of a Rigid Object About a Fixed Axis

Angular Momentum

Static Equilibrium and Elasticity

Universal Gravitation

Fluid Mechanics

Oscillatory Motion

Wave Motion

Sound Waves

Superposition and Standing Waves

Temperature

The First Law of Thermodynamics

The Kinetic Theory of Gases

Heat Engines, entropy, and the Second Law of Thermodynamics

Electric Fields

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current and Resistance

Direct-Current Circuits

Magnetic Fields

Sources of the Magnetic Field

Faradays Law

Inductance

Alternating-Current Circuits

Electromagnetic Waves

The Nature of Light and the Principles of Ray Optics

Image Formation

Wave Optics

Diffraction Patterns and Polarization

Relativity

Introduction to Quantum Physics

Quantum Mechanics

Molecules and Solids

Nuclear Structure

Applications of Nuclear Physics

Particle Physics and Cosmology

Filters

An electron is moving at a speed of 2.1 × 10⁶ m/s in the first Bohr orbit.Determine its de Broglie wavelength.

Light is emitted by hydrogen atoms in the visible range for a hydrogen atom.Its wavelength is 656 nm.What value of n is associated with the light? (R_H = 1.097 × 10⁷ m−¹)

In the subshell of the Li²⁺ ion with orbital quantum number ,the allowed values of the magnetic quantum number Are

The allowed values of For the n = 3 shell in a Li²⁺ ion are