Question 1

A hypothetical atom has four distinct energy states.Assuming all transitions are possible,how many spectral lines can this atom produce?

Accepted Answer

A) 5 
B) 6 
C) 7 
D) 8 
E) more than 8 
A) 5 
B) 6 
C) 7 
D) 8 
E) more than 8

Question 2

Alpha particles are repelled by atomic nuclei because

Accepted Answer

A) of the repelling interaction between an alpha particle and the atomic nucleus. 
B) closeness of each to each other is not permitted. 
C) the force between the alpha particle and the atomic nucleus is opposite to an attractive force. 
D) they both have the same sign of electric charge. 
E) none of these 
A) of the repelling interaction between an alpha particle and the atomic nucleus. 
B) closeness of each to each other is not permitted. 
C) the force between the alpha particle and the atomic nucleus is opposite to an attractive force. 
D) they both have the same sign of electric charge. 
E) none of these

Question 3

The discreteness of energy levels is better understood by considering the electrons to be

Accepted Answer

A) like tiny planets orbiting a sun. 
B) attached to the nucleus by massless springs. 
C) much less massive than the nucleus. 
D) all of these 
E) none of these 
A) like tiny planets orbiting a sun. 
B) attached to the nucleus by massless springs. 
C) much less massive than the nucleus. 
D) all of these 
E) none of these

Question 4

A beam of electrons has

Accepted Answer

A) wave properties. 
B) particle properties. 
C) both of these 
D) neither of these 
A) wave properties. 
B) particle properties. 
C) both of these 
D) neither of these

Question 5

The Bohr model of the atom is akin to a

Accepted Answer

A) miniature solar system. 
B) blob of plum pudding,where raisins represent atomic nuclei. 
C) central heavy ball with lighter balls connected by springs. 
D) all of these 
A) miniature solar system. 
B) blob of plum pudding,where raisins represent atomic nuclei. 
C) central heavy ball with lighter balls connected by springs. 
D) all of these

Question 6

Compared to the average diameter of a hydrogen atom,the average diameter of a helium atom is

Accepted Answer

A) larger. 
B) smaller. 
C) about the same. 
A) larger. 
B) smaller. 
C) about the same.

Question 7

Two photons are emitted as an electron de-excites from the third quantum level to the second,and then to the ground state.The sum of the frequencies of the two photons equals the frequency of the single photon that would be emitted if the de-excitation were from the third to the ground state directly.This is according to

Accepted Answer

A) energy conservation. 
B) the physicist W.Ritz. 
C) both of these 
D) neither of these 
A) energy conservation. 
B) the physicist W.Ritz. 
C) both of these 
D) neither of these

Question 8

A key feature of the theory of chaos is

Accepted Answer

A) unpredictability. 
B) very small initial differences can lead to very large eventual differences. 
C) the randomness of molecular motion makes prediction difficult. 
D) even orderly systems are seen to be disorderly when carefully studied. 
A) unpredictability. 
B) very small initial differences can lead to very large eventual differences. 
C) the randomness of molecular motion makes prediction difficult. 
D) even orderly systems are seen to be disorderly when carefully studied.

Question 9

Compared to the wavelengths of visible light,the wavelengths of matter waves are relatively

Accepted Answer

A) large. 
B) small. 
A) large. 
B) small.

Question 10

A uranium atom is 238 times as massive as a hydrogen atom.The diameter of a uranium atom is the diameter of a hydrogen atom times about

Accepted Answer

A) 3) 
B) 10. 
C) 30. 
D) 100. 
E) 238. 
A) 3) 
B) 10. 
C) 30. 
D) 100. 
E) 238.

Question 11

According to Niels Bohr,an electron in an excited state could give off

Accepted Answer

A) at most a single photon until the atom was excited again. 
B) several photons in a series of transitions to the ground state. 
C) a continuous cascade of photons for a high-level transition. 
D) none of these 
A) at most a single photon until the atom was excited again. 
B) several photons in a series of transitions to the ground state. 
C) a continuous cascade of photons for a high-level transition. 
D) none of these

Question 12

An excited atom decays to its ground state and emits a photon of green light.If instead the atom decays to an intermediate state,then the light emitted could be

Accepted Answer

A) red. 
B) violet. 
C) blue. 
D) any of these 
E) none of these 
A) red. 
B) violet. 
C) blue. 
D) any of these 
E) none of these

Exam 32: The Atom and the Quantum

A hypothetical atom has four distinct energy states.Assuming all transitions are possible,how many spectral lines can this atom produce?

Alpha particles are repelled by atomic nuclei because

The discreteness of energy levels is better understood by considering the electrons to be

A beam of electrons has

The Bohr model of the atom is akin to a

Compared to the average diameter of a hydrogen atom,the average diameter of a helium atom is

A key feature of the theory of chaos is

Compared to the wavelengths of visible light,the wavelengths of matter waves are relatively

A uranium atom is 238 times as massive as a hydrogen atom.The diameter of a uranium atom is the diameter of a hydrogen atom times about

According to Niels Bohr,an electron in an excited state could give off

An excited atom decays to its ground state and emits a photon of green light.If instead the atom decays to an intermediate state,then the light emitted could be

About Science

Newtons First Law of Motion: Inertia

Linear Motion

Newtons Second Law of Motion: Force and Acceleration

Newtons Third Law of Motion: Action and Reaction

Momentum

Energy

Rotational Motion

Gravity

Projectile and Satellite Motion

Atomic Nature of Matter

Solids

Liquids

Gases and Plasmas

Temperature,heat,and Expansion

Heat Transfer

Change of Phase

Thermodynamics

Vibrations and Waves

Sound

Musical Sounds

Electrostatics

Electric Current

Magnetism

Electromagnetic Induction

Properties of Light

Color

Reflection and Refraction

Light Waves

Light Emission

Light Quanta

Atomic Nucleus and Radioactivity

Nuclear Fission and Fusion

Special Theory of Relativity

General Theory of Relativity

Filters