Question 1

If the activity of a sample of 232Th decreases from 1000 cpm to 500 cpm in 60 min, in another 60 min its activity will be

Accepted Answer

A)  500 cpm. 
B)  0 cpm. 
C)  250 cpm. 
D)  125 cpm. 
A)  500 cpm. 
B)  0 cpm. 
C)  250 cpm. 
D)  125 cpm.

Question 2

The half-life of 3H is 12 years. About how long does it take for 63/64 of a sample of that radionuclide to decay?

Accepted Answer

A)  6 years 
B)  11.8 years 
C)  12.2 years 
D)  72 years 
A)  6 years 
B)  11.8 years 
C)  12.2 years 
D)  72 years

Question 3

The diameter of the average atom is about ______________ m.

Accepted Answer

The answer of The diameter of the average atom is...

Question 4

Isotopes of the element named ______________ probably will be the fuel for the first commercial fusion reactors.

Accepted Answer

The answer of Isotopes of the element named ______________ probably...

Question 5

Which of the following four elements is a neutron-absorbing material used in controlling nuclear reactors?

Accepted Answer

A)  Gold 
B)  Boron 
C)  Iron 
D)  Carbon 
A)  Gold 
B)  Boron 
C)  Iron 
D)  Carbon

Question 6

When   decays to   , a(n) _____________ is emitted.

Accepted Answer

A)  alpha particle 
B)  neutron     
C)  gamma ray 
D)  beta particle 
A)  alpha particle 
B)  neutron     
C)  gamma ray 
D)  beta particle

Question 7

How many neutrons are there in an atom of   ?

Accepted Answer

A)  19 
B)  20 
C)  39 
D)  58 
A)  19 
B)  20 
C)  39 
D)  58

Question 8

When   undergoes alpha decay, the daughter is

Accepted Answer

A)    . 
B)    . 
C)    . 
D)    . 
A)    . 
B)    . 
C)    . 
D)    .

Question 9

An exoergic reaction

Accepted Answer

A)  absorbs energy. 
B)  requires a high temperature. 
C)  releases energy. 
D)  occurs only in stars. 
A)  absorbs energy. 
B)  requires a high temperature. 
C)  releases energy. 
D)  occurs only in stars.

Question 10

The number of protons in an atom of    
is ______________.

Accepted Answer

Question 11

Which of the following is a transuranium element?

Accepted Answer

A)  Am 
B)  Pa 
C)  Ra 
D)  Tc 
A)  Am 
B)  Pa 
C)  Ra 
D)  Tc

Question 12

Plasmas are controlled and manipulated using an approach called ______________ confinement.

Accepted Answer

The answer of Plasmas are controlled and manipulated using an...

Question 13

After two half-lives have gone by, what fraction of the original sample of a radionuclide remains?

Accepted Answer

A)  1/8 
B)  1/4 
C)  1/3 
D)  None of these 
A)  1/8 
B)  1/4 
C)  1/3 
D)  None of these

Question 14

Which of the following types of radiation has the least ability to penetrate matter?

Accepted Answer

A)  Alpha particles 
B)  Gamma rays 
C)  X-rays 
D)  Beta particles 
A)  Alpha particles 
B)  Gamma rays 
C)  X-rays 
D)  Beta particles

Question 15

A scientist named ______________ discovered the proton in 1919.

Accepted Answer

The answer of A scientist named ______________ discovered the proton...

Question 16

The name of the transuranium element commonly used in smoke detectors is ______________.

Accepted Answer

The answer of The name of the transuranium element commonly...

Question 17

What type of decay changes only the energy of a nucleus and not its identity?

Accepted Answer

A)  Positron 
B)  Alpha 
C)  Gamma 
D)  Beta 
A)  Positron 
B)  Alpha 
C)  Gamma 
D)  Beta

Question 18

An electron is emitted by an atomic nucleus in the process called ______________ decay.

Accepted Answer

The answer of An electron is emitted by an atomic...

Question 19

Complete the equation:    
______________

Accepted Answer

Question 20

What happens to the atomic number (Z) and the mass number (A) when a nucleus emits a gamma ray?

Accepted Answer

A)  Z increases by 1; A is unchanged. 
B)  Z is unchanged; A is unchanged. 
C)  Z decreases by 1; A is unchanged. 
D)  Z decreases by 2; A decreases by 4. 
A)  Z increases by 1; A is unchanged. 
B)  Z is unchanged; A is unchanged. 
C)  Z decreases by 1; A is unchanged. 
D)  Z decreases by 2; A decreases by 4.

If the activity of a sample of ²³²Th decreases from 1000 cpm to 500 cpm in 60 min, in another 60 min its activity will be

The half-life of ³H is 12 years. About how long does it take for 63/64 of a sample of that radionuclide to decay?

The diameter of the average atom is about ______________ m.

Isotopes of the element named ______________ probably will be the fuel for the first commercial fusion reactors.

Which of the following four elements is a neutron-absorbing material used in controlling nuclear reactors?

When decays to , a(n) _____________ is emitted.

How many neutrons are there in an atom of ?

When undergoes alpha decay, the daughter is

An exoergic reaction

The number of protons in an atom of is ______________.

Which of the following is a transuranium element?

Plasmas are controlled and manipulated using an approach called ______________ confinement.

After two half-lives have gone by, what fraction of the original sample of a radionuclide remains?

Which of the following types of radiation has the least ability to penetrate matter?

A scientist named ______________ discovered the proton in 1919.

The name of the transuranium element commonly used in smoke detectors is ______________.

What type of decay changes only the energy of a nucleus and not its identity?

An electron is emitted by an atomic nucleus in the process called ______________ decay.

Complete the equation: ______________

What happens to the atomic number (Z) and the mass number (A) when a nucleus emits a gamma ray?

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Chemical Reactions

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Exam 10: Organic Chemistry

If the activity of a sample of 232Th decreases from 1000 cpm to 500 cpm in 60 min, in another 60 min its activity will be

The half-life of 3H is 12 years. About how long does it take for 63/64 of a sample of that radionuclide to decay?

The diameter of the average atom is about ______________ m.

Isotopes of the element named ______________ probably will be the fuel for the first commercial fusion reactors.

Which of the following four elements is a neutron-absorbing material used in controlling nuclear reactors?

When decays to , a(n) _____________ is emitted.

How many neutrons are there in an atom of ?

When undergoes alpha decay, the daughter is

An exoergic reaction

The number of protons in an atom of is ______________.

Which of the following is a transuranium element?

Plasmas are controlled and manipulated using an approach called ______________ confinement.

After two half-lives have gone by, what fraction of the original sample of a radionuclide remains?

Which of the following types of radiation has the least ability to penetrate matter?

A scientist named ______________ discovered the proton in 1919.

The name of the transuranium element commonly used in smoke detectors is ______________.

What type of decay changes only the energy of a nucleus and not its identity?

An electron is emitted by an atomic nucleus in the process called ______________ decay.

Complete the equation: ______________

What happens to the atomic number (Z) and the mass number (A) when a nucleus emits a gamma ray?

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Electricity and Magnetism

Atomic Physics

Nuclear Physics

The Chemical Elements

Chemical Bonding

Chemical Reactions

Place and Time

The Solar System

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural Geology and Plate Tectonics

Minerals Rocks and Volcanoes

Surface Processes

Geologic Time

Filters

If the activity of a sample of ²³²Th decreases from 1000 cpm to 500 cpm in 60 min, in another 60 min its activity will be

The half-life of ³H is 12 years. About how long does it take for 63/64 of a sample of that radionuclide to decay?