Question 1

A sample of relatively active radioactive material is somewhat

Accepted Answer

A)  warmer than the environment.
B)  cooler than the environment.
C)  neither really

Question 2

Artificially induced radioactive elements generally have

Accepted Answer

A)  long half-lives.
B)  short half-lives.

Question 3

When an alpha particle is ejected from a nucleus,the nucleus then has less

Accepted Answer

A)  mass.
B)  charge.
C)  both of these
D)  neither of these

Question 4

An atom with an imbalance of electrons to protons is

Accepted Answer

A)  a hadron.
B)  a baryon.
C)  an ion.
D)  an isotope.
E)  none of these

Question 5

Pure elements can be transformed into entirely different elements.This statement at the present time is

Accepted Answer

A) True 
 B)False

Question 6

Which of the following isotopes is radioactive?

Accepted Answer

A)  Carbon-12
B)  Carbon-14
C)  Both are radioactive.
D)  Neither is radioactive in nature.

Question 7

A certain radioactive isotope placed near a Geiger counter registers 120 counts per minute.If the half-life of the isotope is one day,what will the count rate be at the end of four days?

Accepted Answer

A)  30 counts/min
B)  15 counts/min
C)  10 counts/min
D)  7) 5 counts/min
E)  5 counts/min

Question 8

The origin of cosmic rays is the

Accepted Answer

A)  Earth.
B)  clouds.
C)  sun.
D)  cosmos.
E)  none of these

Question 9

Most of the radioactivity we personally encounter comes from

Accepted Answer

A)  fallout from past and present testing of nuclear weapons.
B)  nuclear power plants.
C)  medical X rays.
D)  the natural environment.

Question 10

Which experiences the least electrical force in an electric field?

Accepted Answer

A)  alpha particle
B)  beta particle
C)  electron
D)  gamma ray
E)  All experience the same force.

Question 11

The half-life of carbon 14 is 5730 years.If a 1-gram sample of old carbon is 1/8 as radioactive as 1-gram of a current sample,then the age of the old sample is about

Accepted Answer

A)  716 years.
B)  11,500 years.
C)  17,200 years.
D)  22,900 years.
E)  46,000 years.

Question 12

Deuterium and tritium are both

Accepted Answer

A)  forms of hydrogen.
B)  isotopes of the same element.
C)  both of these
D)  neither of these

Question 13

When a gamma ray is emitted by a nucleus,the nucleus then has less

Accepted Answer

A)  energy.
B)  charge.
C)  both of these
D)  neither of these

Question 14

Carbon 14 is produced in the atmosphere principally by

Accepted Answer

A)  plants and animals.
B)  cosmic-ray bombardment.
C)  nitrogen bombardment.
D)  photosynthesis.
E)  none of these

Question 15

Different isotopes of an element have different numbers of

Accepted Answer

A)  protons.
B)  hadrons.
C)  photons.
D)  neutrons.
E)  none of these

Question 16

X-rays may be regarded as

Accepted Answer

A)  high frequency sound waves.
B)  high frequency radio waves.
C)  both of these
D)  none of these

Question 17

Which body is heated in its interior by nuclear processes?

Accepted Answer

A)  the sun
B)  the Earth
C)  both
D)  neither

Question 18

If an alpha particle and a beta particle have the same energy,which particle will penetrate farther into an object?

Accepted Answer

A)  alpha particle
B)  beta particle
C)  They both penetrate the same distance.

Question 19

When a nucleus emits a beta particle,its atomic number

Accepted Answer

A)  increases by 1.
B)  decreases by 1.
C)  increases by 2.
D)  decreases by 2.
E)  none of these

Question 20

A device that is used primarily to detect nuclear radiation is a

Accepted Answer

A)  synchrotron.
B)  linear accelerator.
C)  cyclotron.
D)  All of the above choices are correct.
E)  None of the above choices are correct.

Exam 33: Atomic Nucleus and Radioactivity

A device that is used primarily to detect nuclear radiation is a

Correct AnswerverifiedShow Answer

X-rays may be regarded as

Correct AnswerverifiedShow Answer

Which of the following isotopes is radioactive?

Correct AnswerverifiedShow Answer

The origin of cosmic rays is the

Correct AnswerverifiedShow Answer

The half-life of carbon 14 is 5730 years.If a 1-gram sample of old carbon is 1/8 as radioactive as 1-gram of a current sample,then the age of the old sample is about

Correct AnswerverifiedShow Answer

Deuterium and tritium are both

Correct AnswerverifiedShow Answer

Carbon 14 is produced in the atmosphere principally by

Correct AnswerverifiedShow Answer

Pure elements can be transformed into entirely different elements.This statement at the present time is

Correct AnswerverifiedShow Answer

When a gamma ray is emitted by a nucleus,the nucleus then has less

Correct AnswerverifiedShow Answer

Most of the radioactivity we personally encounter comes from

Correct AnswerverifiedShow Answer

When a nucleus emits a beta particle,its atomic number

Correct AnswerverifiedShow Answer

A sample of relatively active radioactive material is somewhat

Correct AnswerverifiedShow Answer

An atom with an imbalance of electrons to protons is

Correct AnswerverifiedShow Answer

When an alpha particle is ejected from a nucleus,the nucleus then has less

Correct AnswerverifiedShow Answer

Which experiences the least electrical force in an electric field?

Correct AnswerverifiedShow Answer

Different isotopes of an element have different numbers of

Correct AnswerverifiedShow Answer

Artificially induced radioactive elements generally have

Correct AnswerverifiedShow Answer

A certain radioactive isotope placed near a Geiger counter registers 120 counts per minute.If the half-life of the isotope is one day,what will the count rate be at the end of four days?

Correct AnswerverifiedShow Answer

If an alpha particle and a beta particle have the same energy,which particle will penetrate farther into an object?

Correct AnswerverifiedShow Answer

Which body is heated in its interior by nuclear processes?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified