Question 1

The time interval during which a nucleus has a 50% probability of decaying is its

Accepted Answer

A) half-life. 
B) decay time. 
C) nuclei activation time. 
D) binding energy time. 
E) none of the above.

Question 2

The symbol indicating the mass number of a nucleus is __________.

Accepted Answer

The answer of The symbol indicating the mass number of...

Question 3

Carbon-14 dating can be used to find the age of material up to ____________ of years old.

Accepted Answer

A) millions 
B) billions 
C) hundreds of thousands 
D) tens of thousands

Question 4

Fuel rods in a nuclear reactor contain only about 3% uranium-235 and the remainder is mostly uranium-238.As the uranium-238 absorbs a neutron during reactions,it becomes __________,which undergoes two beta decays to become __________.

Accepted Answer

A) uranium-239 
B) uranium-237 
C) plutonium-239 
D) plutonium-238

Question 5

A gamma ray is another name for an electron.

Accepted Answer

A) True 
 B)False

Question 6

When a nucleus in an excited state decays to the ground state,the particle emitted is

Accepted Answer

A) an alpha particle. 
B) a beta particle. 
C) a gamma ray. 
D) an x-ray. 
E) none of the above.

Question 7

The expression(s)indicating the number of protons in a nucleus is

Accepted Answer

A) A. 
B) N. 
C) Z. 
D) Z + N. 
E) A - Z.

Question 8

The hydrogen in the universe was formed by the energy of the Big Bang.

Accepted Answer

A) True 
 B)False

Question 9

The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is

Accepted Answer

A) nuclear fission analysis. 
B) nuclear fusion analysis. 
C) neutron activation analysis. 
D) nuclear emission analysis. 
E) beta decay analysis.

Question 10

The expression(s)indicating the mass number of a nucleus is

Accepted Answer

A) A. 
B) N. 
C) Z. 
D) Z + N. 
E) A - Z.

Question 11

Magnetic confinement is used in controlled fusion experiments to control a plasma.

Accepted Answer

A) True 
 B)False

Question 12

​Match each item with the correct statement below.
-the splitting of a large nucleus into two smaller nuclei

Accepted Answer

A) ​alpha particle 
B) ​atomic bomb 
C) ​atomic mass number 
D) ​atomic number 
E) ​beta particle
F)​binding energy
G)​half-life
H)​hydrogen bomb
I)​neutron activation analysis
J)​neutron number
K)​nuclear fission
L)​nuclear fusion
M)​tokamak

Question 13

The symbol indicating the number of protons in a nucleus is __________.

Accepted Answer

The answer of The symbol indicating the number of protons...

Question 14

When sulfur-35 (Z = 16)decays to chlorine-35 (Z = 17),an alpha particle is emitted.

Accepted Answer

A) True 
 B)False

Question 15

How do isotopes of a given element differ?

Accepted Answer

A) They have different mass numbers. 
B) They have different neutron numbers. 
C) They have different atomic numbers. 
D) They have different quantum numbers. 
E) none of the above

Question 16

A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope.The count rate 24 minutes later is 1,000 counts per minute.The half-life of the radioisotope is __________.

Accepted Answer

The answer of A Geiger counter registers a count rate...

Question 17

If one waits for a time equal to two half-lives for a certain radioactive material,all of it originally present will have decayed completely.

Accepted Answer

A) True 
 B)False

Question 18

If one half-life for an isotope is 25,000 years,then 10 half-lives would be _______ years.

Accepted Answer

A) 2,500 
B) 25,000 
C) 125,000 
D) 250,000

Question 19

Which of the following is not the usual outcome of nuclear fission?

Accepted Answer

A) The binding energy per nucleon of the fission fragments is smaller than that of the original nucleus. 
B) Energy is released. 
C) Neutrons are released. 
D) The fission fragments are radioactive.

Question 20

Low levels of ionizing radiation

Accepted Answer

A) are dangerous to the human body. 
B) can be tolerated by the human body. 
C) are beneficial to the human body. 
D) none of the above

Exam 11: Nuclear Physics

The time interval during which a nucleus has a 50% probability of decaying is its

The symbol indicating the mass number of a nucleus is __________.

Carbon-14 dating can be used to find the age of material up to ____________ of years old.

Fuel rods in a nuclear reactor contain only about 3% uranium-235 and the remainder is mostly uranium-238.As the uranium-238 absorbs a neutron during reactions,it becomes ,which undergoes two beta decays to become .

A gamma ray is another name for an electron.

When a nucleus in an excited state decays to the ground state,the particle emitted is

The expression(s) indicating the number of protons in a nucleus is

The hydrogen in the universe was formed by the energy of the Big Bang.

The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is

The expression(s) indicating the mass number of a nucleus is

Magnetic confinement is used in controlled fusion experiments to control a plasma.

Match each item with the correct statement below. -the splitting of a large nucleus into two smaller nuclei

The symbol indicating the number of protons in a nucleus is __________.

When sulfur-35 (Z = 16)decays to chlorine-35 (Z = 17),an alpha particle is emitted.

How do isotopes of a given element differ?

A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope.The count rate 24 minutes later is 1,000 counts per minute.The half-life of the radioisotope is __________.

If one waits for a time equal to two half-lives for a certain radioactive material,all of it originally present will have decayed completely.

If one half-life for an isotope is 25,000 years,then 10 half-lives would be _______ years.

Which of the following is not the usual outcome of nuclear fission?

Low levels of ionizing radiation

Exam 11: Nuclear Physics

The time interval during which a nucleus has a 50% probability of decaying is its

The symbol indicating the mass number of a nucleus is __________.

Carbon-14 dating can be used to find the age of material up to ____________ of years old.

Fuel rods in a nuclear reactor contain only about 3% uranium-235 and the remainder is mostly uranium-238.As the uranium-238 absorbs a neutron during reactions,it becomes __________,which undergoes two beta decays to become __________.

A gamma ray is another name for an electron.

When a nucleus in an excited state decays to the ground state,the particle emitted is

The expression(s) indicating the number of protons in a nucleus is

The hydrogen in the universe was formed by the energy of the Big Bang.

The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is

The expression(s) indicating the mass number of a nucleus is

Magnetic confinement is used in controlled fusion experiments to control a plasma.

​Match each item with the correct statement below. -the splitting of a large nucleus into two smaller nuclei

The symbol indicating the number of protons in a nucleus is __________.

When sulfur-35 (Z = 16)decays to chlorine-35 (Z = 17),an alpha particle is emitted.

How do isotopes of a given element differ?

A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope.The count rate 24 minutes later is 1,000 counts per minute.The half-life of the radioisotope is __________.

If one waits for a time equal to two half-lives for a certain radioactive material,all of it originally present will have decayed completely.

If one half-life for an isotope is 25,000 years,then 10 half-lives would be _______ years.

Which of the following is not the usual outcome of nuclear fission?

Low levels of ionizing radiation

Fuel rods in a nuclear reactor contain only about 3% uranium-235 and the remainder is mostly uranium-238.As the uranium-238 absorbs a neutron during reactions,it becomes ,which undergoes two beta decays to become .

Match each item with the correct statement below. -the splitting of a large nucleus into two smaller nuclei