Question 1

Which of the following gives the correct order for the energies of portions of the electromagnetic spectrum?

Accepted Answer

A)  radio > infrared > ultraviolet 
B)  radio > ultraviolet > infrared 
C)  ultraviolet > infrared > radio 
D)  ultraviolet > radio > infrared

Question 2

Examine the following graph for a particular isotope. 
-After 24 days, approximately how much of the sample is left?

Accepted Answer

A)  5 g 
B)  2.5 g 
C)  1.25 g 
D)  0.625 g 
E)  0.313 g

Question 3

Radiation detectors use which of the following properties to detect radioactivity?

Accepted Answer

A)  charge 
B)  ionizing ability 
C)  mass 
D)  all of these

Question 4

The amount of radiation absorbed by tissues is measured by which of the following?

Accepted Answer

A)  curie 
B)  rad 
C)  roentgen 
D)  all of these

Question 5

Approximately what percentage of an individual's average annual exposure to radiation is associated with naturally occurring radiation?

Accepted Answer

A)  20% 
B)  40% 
C)  60% 
D)  80%

Question 6

Which of the following gives the correct order for the frequencies of portions of the electromagnetic spectrum?

Accepted Answer

A)  radio > infrared > ultraviolet 
B)  radio > ultraviolet > infrared 
C)  ultraviolet > infrared > radio 
D)  ultraviolet > radio > infrared

Question 7

Boron-10 is able to absorb neutrons and is therefore used in control rods in nuclear reactors. After B-10 absorbs a neutron it emits an α particle. What isotope is produced as a result of neutron absorption followed by α emission?

Accepted Answer

A)  B-11 
B)  Be-7 
C)  C-11 
D)  Li-7

Question 8

Which of the following is the most dangerous form of radiation?

Accepted Answer

A)  α 
B)  β 
C)  γ 
D)  They are all equally dangerous.

Question 9

Which of the following is the most important biological measure of radiation?

Accepted Answer

A)  curie 
B)  rad 
C)  rem 
D)  roentgen

Question 10

Which of the following forms of radiation consists of positively charged particles?

Accepted Answer

A)  α 
B)   
C)   
D)  none of these

Question 11

Examine the following figure. 
-Which line represents an alpha particle?

Accepted Answer

A)  A 
B)  B 
C)  C

Question 12

Beryllium-7 decays by electron capture. What isotope is formed when 7Be decays in this way?

Accepted Answer

A)  7B 
B)  6Be 
C)  8Be 
D)  7Li

Question 13

Alpha particles are less penetrating than beta particles. Which of the following is least related to this observation?

Accepted Answer

A)  their charges 
B)  their energies 
C)  their respective masses 
D)  None, they are all roughly equally important.

Question 14

Which of the following Greek letters is not commonly applied to a form of radioactivity?

Accepted Answer

A)  α 
B)   
C)   
D)

Question 15

Different isotopes are useful in different dating processes. Suppose we wished to determine the age of an object which we suspect to be approximately 10,000 years old. An isotope with which of the following half-lives would be most appropriate for this project?

Accepted Answer

A)  50 years 
B)  500 years 
C)  5,000 years 
D)  50,000 years

Exam 9: Nuclear Chemistry