Atoms and Nuclei (AIIMS 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 

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 

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 

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. 


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. 


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 

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 
