Nuclei

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Question

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Question 1 : Chadwick was awarded the Nobel prize in Physics in 1935 for his discovery of _______________
1. neutron
2. electron
3. proton
4. None of these
Answer
8806

Question 2 :

The density of a nucleus is of the order of _____________

1. 10¹⁷ kg m^-3
2. 10¹⁶ kg m^-3
3. 10¹⁵ kg m^-3
4. 10¹⁸ kg m^-3
Answer
8807

Question 3 :

When the mass of a sample of a radioactive substance decreases, the mean life of the sample _____________

1. first decreases then increases
2. remain unchanged
3. decreases
4. increases
Answer
8808

Question 4 : Alpha particle emitted from a radioactive material are ____________
1. Hydrogen nuclei
2. Lithium nuclei
3. Helium nuclei
4. None of the above
Answer
8809

Question 5 : The half life of a radioactive decay is n times its mean life, n is equal to ______________
1. 0.0693
2. 0.3070
3. 0.6930
4. None of the above
Answer
8810