Question 1

If 25 mg of an initially 200. mg sample of bromine-74 is still active after 75 minutes, the half-life of bromine-74 is _____ minutes.

Accepted Answer

The answer of If 25 mg of an initially 200....

Question 2

How many neutrons are generated in the nuclear equation shown below?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4

Question 3

During gamma emission there is no change in the atomic number or mass number of a radioactive nucleus.

Accepted Answer

A) True 
 B)False

Question 4

The light and heat of the sun and other stars is a result of nuclear fusion.

Accepted Answer

A) True 
 B)False

Question 5

Nuclear fusion is the splitting apart of a heavy nucleus into lighter nuclei and neutrons.

Accepted Answer

A) True 
 B)False

Question 6

An alpha particle is identical to a helium atom.

Accepted Answer

A) True 
 B)False

Question 7

What are the number of protons, the number of neutrons, and the mass number of the radioisotope  ?

Accepted Answer

A)  149, 102, and 251, respectively
B)  102, 149, and 251, respectively
C)  102, 251, and 353, respectively
D)  149, 251, and 353, respectively

Question 8

Which unit describes the amount of radiation absorbed by one gram of a substance?

Accepted Answer

A)  rad
B)  rem
C)  Bq
D)  gray

Question 9

Radioisotopes that are used for diagnosis and imaging in medicine have short half-lives so they do not linger in the body.

Accepted Answer

A) True 
 B)False

Question 10

Which quantity represents the greatest amount of radioactivity?

Accepted Answer

A)  1 × 10-3 Ci
B)  1 × 104 mCi
C)  1 Bq
D)  1 × 10-10  μ\muμ Ci

Question 11

Which species completes this nuclear equation shown below?   →\rightarrow→  _____ +

Accepted Answer

A)   
B)   
C)   
D)

Question 12

Which type of radiation has a negligible mass and a charge of +1?

Accepted Answer

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

Question 13

Which is the symbol for a beta particle?

Accepted Answer

A)   
B)   
C)   
D)

Question 14

What does it mean if a substance is described as being radioactive?

Accepted Answer

A)  The substance emits high energy particles or rays from its unstable nucleus.
B)  The substance was exposed to radiation that was given off by a decaying nucleus.
C)  The substance readily absorbs energy from the radiofrequency region of the electromagnetic spectrum.
D)  The substance is extremely small and special radiomicroscopes are necessary to view it.

Question 15

In the nuclear decay reaction known as electron capture, an electron from an atom's electron cloud falls into the nucleus. Iodine-128 undergoes electron capture as shown below to produce an x-ray and another product. The isotope symbol for the other product is _____.

Accepted Answer

The answer of In the nuclear decay reaction known as...

Question 16

Which type of radiation has the greatest penetrating power?

Accepted Answer

A)  An alpha particle
B)  A gamma ray
C)  A beta particle
D)  All of the above have the same penetrating power.

Question 17

Which quantity represents the smallest amount of radioactivity?

Accepted Answer

A)  1 × 10-3 Ci
B)  1 × 104 mCi
C)  1 Bq
D)  1 × 1010  μ\muμ Ci

Question 18

Only fusion can involve bombarding a nucleus with a neutron.

Accepted Answer

A) True 
 B)False

Question 19

_____ is the process by which an unstable radioactive nucleus emits radiation, forming a nucleus of new composition.

Accepted Answer

The answer of _____ is the process by which an...

Question 20

The fusion of two helium-3 nuclei produces two protons and what other nucleus?

Accepted Answer

A)   
B)   
C)   
D)

Exam 10: Nuclear Chemistry

_____ is the process by which an unstable radioactive nucleus emits radiation, forming a nucleus of new composition.

Correct AnswerverifiedShow Answer

Which species completes this nuclear equation shown below? →\rightarrow→ _____ +

Correct AnswerverifiedShow Answer

Radioisotopes that are used for diagnosis and imaging in medicine have short half-lives so they do not linger in the body.

Correct AnswerverifiedShow Answer

Which is the symbol for a beta particle?

Correct AnswerverifiedShow Answer

Nuclear fusion is the splitting apart of a heavy nucleus into lighter nuclei and neutrons.

Correct AnswerverifiedShow Answer

The fusion of two helium-3 nuclei produces two protons and what other nucleus?

Correct AnswerverifiedShow Answer

Which type of radiation has a negligible mass and a charge of +1?

Correct AnswerverifiedShow Answer

Only fusion can involve bombarding a nucleus with a neutron.

Correct AnswerverifiedShow Answer

What does it mean if a substance is described as being radioactive?

Correct AnswerverifiedShow Answer

Which unit describes the amount of radiation absorbed by one gram of a substance?

Correct AnswerverifiedShow Answer

What are the number of protons, the number of neutrons, and the mass number of the radioisotope ?

Correct AnswerverifiedShow Answer

An alpha particle is identical to a helium atom.

Correct AnswerverifiedShow Answer

Which quantity represents the smallest amount of radioactivity?

Correct AnswerverifiedShow Answer

During gamma emission there is no change in the atomic number or mass number of a radioactive nucleus.

Correct AnswerverifiedShow Answer

In the nuclear decay reaction known as electron capture, an electron from an atom's electron cloud falls into the nucleus. Iodine-128 undergoes electron capture as shown below to produce an x-ray and another product. The isotope symbol for the other product is _____.

Correct AnswerverifiedShow Answer

Which quantity represents the greatest amount of radioactivity?

Correct AnswerverifiedShow Answer

The light and heat of the sun and other stars is a result of nuclear fusion.

Correct AnswerverifiedShow Answer

Which type of radiation has the greatest penetrating power?

Correct AnswerverifiedShow Answer

If 25 mg of an initially 200. mg sample of bromine-74 is still active after 75 minutes, the half-life of bromine-74 is _____ minutes.

Correct AnswerverifiedShow Answer

How many neutrons are generated in the nuclear equation shown below?

Correct AnswerverifiedShow Answer

Correct Answer
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Which species completes this nuclear equation shown below? $Which species completes this nuclear equation shown below? \rightarrow ___ + A) B) C) D)$ $\rightarrow$ _ + $Which species completes this nuclear equation shown below? \rightarrow ___ + A) B) C) D)$

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