MEDIUM
12th West Bengal Board
IMPORTANT
Earn 100

We know that the atomic mass of an element is the weighted average of the atomic masses of the different isotopes of that element. This explains why atomic masses of many elements show large departures from integral values. However even if we consider masses of individual isotopes, they are not strictly integral multiples of mass of a hydrogen atom. How do you account for this fact.

Important Questions on Nuclear Physics

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 43
Using the curve for the binding energy per nucleon as a function of mass number A, state clearly how the release in energy in the process of nuclear fission and nuclear fusion can be explained.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 44
Define the term 'activity of given sample of radio nuclide. Write the expression for the law of radioactive decay in terms of the activity of a given sample. 
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 45
When a nucleus(X) undergoes β -decay, it transforms to the nucleus (Y). Does the (X,Y) form isotope, isobar or isotone? Justify your answer.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 46
When a heavy nucleus with mass number A=240 breaks into two nuclei A=120, energy is released in the process. Why?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 47
In β -decay the experimental detection of neutrinos (or antineutrinos) is found to be extremely difficult. Why?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 48
Identify the nature of the 'radioactive radiations', emitted in each step of the 'decay chain' given below

XZA→YZ-2A-4⟶YZ-2A-4→WZ-1A-4

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 49
Explain, with the help of a nuclear reaction in each of the following cases, how the neutron to proton ratio changes during (i) α -decay, 
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 22 - Nuclear Physics>EXERCISE 22>Q 49
Explain, with the help of a nuclear reaction in each of the following cases, how the neutron to proton ratio changes during (ii) β -decay ?