Atoms and Nuclei (AIIMS (All India Institute of Medical Sciences) Physics): Questions 18  24 of 32
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Question number: 18
» Atoms and Nuclei » Radioactive Decay Law
Question
A radioactive material has a half – life of 8 days. What fraction of the material would remain after 48 days –
Choices
Choice (4)  Response  

a.  0.156 

b.  0.0625 

c.  0.625 

d.  0.0156 

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Question number: 19
» Atoms and Nuclei » Composition and Size of Nucleus
Question
The proposal that no more than two electrons may occupy a particular atomic orbital was made be –
Choices
Choice (4)  Response  

a.  Curie 

b.  Pauling 

c.  Pauli 

d.  Einstein 

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Question number: 20
» Atoms and Nuclei » Half Life and Mean Life
Question
A radioactive substance decays to of its initial activity in 20 days. The halflife of the radioactive substance expressed in days is –
Choices
Choice (4)  Response  

a.  2 

b.  6 

c.  8 

d.  12 

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Question number: 21
» Atoms and Nuclei » Radioactive Decay Law
Question
A radioactive material has a half – life of 8 days. What fraction of the material would remain after 32 days –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 22
» Atoms and Nuclei » Binding Energy Per Nucleon
Question
If mass defect of an alpha particle is 0.05 amu, what is its binding energy per nucleon?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 23
» Atoms and Nuclei » Radioactive Decay Law
Question
A radioactive material has a half – life of 9 days. What fraction of the material would remain after 45 days –
Choices
Choice (4)  Response  

a.  0.03125 

b.  0.625 

c.  0.125 

d.  0.0156 

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Question number: 24
» Atoms and Nuclei » Half Life and Mean Life
Question
A radioactive substance decays to of its initial activity in 48 days. The halflife of the radioactive substance expressed in days is –
Choices
Choice (4)  Response  

a.  32 

b.  8 

c.  30 

d.  16 

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