Question 1

Iodine-131 decays by beta decay to

Accepted Answer

A) iodine-132. 
B) tellurium-131. 
C) iodine-130. 
D) bromine-131. 
E) xenon-131. 
A) iodine-132. 
B) tellurium-131. 
C) iodine-130. 
D) bromine-131. 
E) xenon-131.

Question 2

Tc →   Tc + ________

Accepted Answer

The answer of   Tc →   Tc...

Question 3

What is missing in the nuclear reaction shown below?   B +   He →   N + ________

Accepted Answer

A) gamma radiation 
B) a positron 
C) a neutron 
D) an alpha particle 
E) a beta particle 
A) gamma radiation 
B) a positron 
C) a neutron 
D) an alpha particle 
E) a beta particle

Question 4

Medical radioisotopes used for diagnostic purposes typically have short half-lives.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is suitable as a minimum shielding for beta particles?

Accepted Answer

A) air 
B) 1 m of water 
C) gloves 
D) 1 m of concrete 
E) 1 cm of lead 
A) air 
B) 1 m of water 
C) gloves 
D) 1 m of concrete 
E) 1 cm of lead

Question 6

Sodium-24 has a half-life of 15 hours. How many hours is three half-lives?

Accepted Answer

A) 60 hours 
B) 45 hours 
C) 30 hours 
D) 15 hours 
E) 7.5 hours 
A) 60 hours 
B) 45 hours 
C) 30 hours 
D) 15 hours 
E) 7.5 hours

Question 7

The radioisotope used as a diagnostic tool to measure thyroid function is ________.

Accepted Answer

The answer of The radioisotope used as a diagnostic tool...

Question 8

When an atom of uranium-235 is bombarded with neutrons, it splits into smaller nuclei and produces a great amount of energy. This nuclear process is called

Accepted Answer

A) fission. 
B) fusion. 
C) decomposition. 
D) chain reaction. 
E) ionization. 
A) fission. 
B) fusion. 
C) decomposition. 
D) chain reaction. 
E) ionization.

Question 9

In the nuclear equation of a beta emitter

Accepted Answer

A) the new nucleus contains 2 fewer protons. 
B) the new nucleus contains 2 more protons. 
C) the mass number of the new nucleus is 4 less than that of the original nucleus. 
D) the new nucleus contains 1 more proton. 
E) the new nucleus contains 1 less proton. 
A) the new nucleus contains 2 fewer protons. 
B) the new nucleus contains 2 more protons. 
C) the mass number of the new nucleus is 4 less than that of the original nucleus. 
D) the new nucleus contains 1 more proton. 
E) the new nucleus contains 1 less proton.

Question 10

One symbol for the β particle is   β. Another symbol for the same particle is ________.

Accepted Answer

The answer of One symbol for the β particle is...

Question 11

Nuclear fusion does not occur naturally.

Accepted Answer

A) True 
 B)False

Question 12

The symbol   is a symbol used for a(n)

Accepted Answer

A) proton. 
B) positron. 
C) gamma ray. 
D) beta particle. 
E) alpha particle. 
A) proton. 
B) positron. 
C) gamma ray. 
D) beta particle. 
E) alpha particle.

Question 13

What is the nuclear symbol for a radioactive isotope of copper with a mass number of 60?

Accepted Answer

A)   
B)   
C) ${29}Cu$ 
D)   
E)   
A)   
B)   
C) ${29}Cu$ 
D)   
E)

Question 14

The process by which a large nucleus breaks into smaller pieces, releasing large amounts of energy is called nuclear ________.

Accepted Answer

The answer of The process by which a large nucleus...

Question 15

Nitrogen-17 is a beta emitter. What is the isotope produced in the radioactive decay?

Accepted Answer

A)  C 
B)  B 
C)  N 
D)  F 
E)  O 
A)  C 
B)  B 
C)  N 
D)  F 
E)  O

Question 16

Sr → ________ +   e + energy

Accepted Answer

The answer of   Sr → ________ + ...

Question 17

If absorbed internally, alpha particle emitters are the most damaging because alpha particles

Accepted Answer

A) have the largest charge. 
B) have the greatest energy. 
C) have the greatest mass. 
D) consist of high energy electrons. 
E) consist of pure energy. 
A) have the largest charge. 
B) have the greatest energy. 
C) have the greatest mass. 
D) consist of high energy electrons. 
E) consist of pure energy.

Question 18

A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 mCi/mL. If the patient undergoing the test needs a dose of 10. mCi, how much of the solution should be injected into the patient?

Accepted Answer

A) 45 mL 
B) .45 mL 
C) 2.2 mL 
D) 22 mL 
E) 4.5 mL 
A) 45 mL 
B) .45 mL 
C) 2.2 mL 
D) 22 mL 
E) 4.5 mL

Question 19

The symbol  is a symbol used for a(n)

Accepted Answer

A) proton. 
B) neutron. 
C) gamma ray. 
D) beta particle. 
E) alpha particle. 
A) proton. 
B) neutron. 
C) gamma ray. 
D) beta particle. 
E) alpha particle.

Question 20

The half-life of a radioisotope is

Accepted Answer

A) one-half of the time it takes for the radioisotope to completely decay to a nonradioactive isotope. 
B) the time it takes for the radioisotope to become an isotope with one-half of the atomic weight of the original radioisotope. 
C) the time it takes for the radioisotope to become an isotope with one-half the atomic number of the original radioisotope. 
D) the time it takes for the radioisotope to lose one-half of its neutrons. 
E) the time it takes for one-half of the sample to decay. 
A) one-half of the time it takes for the radioisotope to completely decay to a nonradioactive isotope. 
B) the time it takes for the radioisotope to become an isotope with one-half of the atomic weight of the original radioisotope. 
C) the time it takes for the radioisotope to become an isotope with one-half the atomic number of the original radioisotope. 
D) the time it takes for the radioisotope to lose one-half of its neutrons. 
E) the time it takes for one-half of the sample to decay.

Exam 5: Nuclear Chemistry

Iodine-131 decays by beta decay to

Tc → Tc + ________

What is missing in the nuclear reaction shown below? B + He → N + ________

Medical radioisotopes used for diagnostic purposes typically have short half-lives.

Which of the following is suitable as a minimum shielding for beta particles?

Sodium-24 has a half-life of 15 hours. How many hours is three half-lives?

The radioisotope used as a diagnostic tool to measure thyroid function is ________.

When an atom of uranium-235 is bombarded with neutrons, it splits into smaller nuclei and produces a great amount of energy. This nuclear process is called

In the nuclear equation of a beta emitter

One symbol for the β particle is β. Another symbol for the same particle is ________.

Nuclear fusion does not occur naturally.

The symbol is a symbol used for a(n)

What is the nuclear symbol for a radioactive isotope of copper with a mass number of 60?

The process by which a large nucleus breaks into smaller pieces, releasing large amounts of energy is called nuclear ________.

Nitrogen-17 is a beta emitter. What is the isotope produced in the radioactive decay?

Sr → ________ + e + energy

If absorbed internally, alpha particle emitters are the most damaging because alpha particles

A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 mCi/mL. If the patient undergoing the test needs a dose of 10. mCi, how much of the solution should be injected into the patient?

The symbol is a symbol used for a(n)

The half-life of a radioisotope is

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