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IPC 8D: Radioactivity and Nuclear Reactions

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
The type of radioactive particle that can be stopped by a sheet of paper is the ____.
a.
alpha particle
c.
gamma ray
b.
beta particle
d.
uranium
 

 2. 
A helium nucleus with two protons and two neutrons is called a(n) ____.
a.
alpha particle
c.
electroscope
b.
beta particle
d.
gamma ray
 

 3. 
When the strong force is not sufficient to hold unstable nuclei together permanently, ____.
a.
nuclear fusion occurs
c.
the nuclei decay
b.
a solid becomes a liquid
d.
carbon-12 changes into carbon-14
 

 4. 
An instrument that detects radiation by means of a superheated liquid is a ____.
a.
bubble chamber
c.
Geiger counter
b.
cloud chamber
d.
photographic plate
 

 5. 
Negatively charged particles emitted from a nucleus at a high speed are ____.
a.
alpha particles
c.
gamma rays
b.
beta particles
d.
X rays
 

 6. 
The process by which nuclei having low masses are united to form nuclei with larger masses is ____.
a.
a chain reaction
c.
nuclear fission
b.
a chemical reaction
d.
nuclear fusion
 

 7. 
The three types of nuclear radiation in increasing order of penetrating power are ____.
a.
alpha, beta, gamma
c.
X ray, beta, gamma
b.
alpha, gamma, beta
d.
X ray, gamma, beta
 

 8. 
Radioactive tracers are useful in ____.
a.
calculating the ages of fossils
c.
fueling nuclear reactions
b.
determining medical problems
d.
treating brain tumors
 

 9. 
When an electroscope is given a(n) ____, its leaves repel each other and spread apart.
a.
moving particle
c.
negative charge
b.
radioactive sample
d.
positive charge
 

 10. 
If a source of radiation is placed near ____ cells, atoms in the cells can be ionized and can die or stop growing.
a.
thyroid
c.
heart
b.
fat
d.
cancer
 



 
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