List of top Physics Questions on Nuclei asked in UP Board XII

What are isotone nuclei? In a nucleus average mass of nucleons is \(1.67\times10^{-27}\) Kg. Find the density of nucleus. [Given \(R_0 = 1.2\times10^{-15}\) m.]
In a nuclear fusion reaction mass defect is 0.2%. What will be amount of energy released in the fusion of 1 kg mass?
What is the phenomenon of radioactivity? How many types are there of radioactive decay?
In the given nuclear reaction, particle W is: \[ {}_{2}^{4}\text{He} + {}_{Z}^{A}X \ \rightarrow\ {}_{Z+2}^{A+3}Y + W \]
Write the characteristics of nuclear force. How is it different from gravitational and electric (electrostatic) forces?
Find out equivalent energy of 1·0 gm of a substance.
Explain the proton-neutron hypothesis in the structure of nucleus.
Write the difference between isotopic, isobaric and isotonic nuclei. Give an example of each.
What is the phenomenon of radioactivity?
Explain nuclear fission and nuclear fusion with examples.
Define mass defect and binding energy.
Write the formula relating the radius and mass number of a nucleus and show that nuclear density does not depend on the mass number.
From which part of the atom are radioactive radiation emitted?
Mainly on which factor does the stability of a nucleus depend?
What is the meaning of nucleon? What is the mass number of nucleus? Write down the relation between mass number and radius of nucleus and show that the density of nucleus does not depend on mass number.
What is meant by mass-defect? In a nuclear fission reaction, find out the value of the fission energy \( Q \).
Explain Nuclear fusion.
Classify nuclei. By giving example of each. Write their characteristics.
In the following nuclear reaction X is
\(_{2}^{4}\text{He} + _{7}^{14}\text{N} \rightarrow _{8}^{17}\text{O} + \text{X}\)
Differentiate between isotopes and isobars.
Explain binding energy. If 0.3% be the mass defect in a nuclear fusion reaction then how much energy will be released in fusion reaction of mass of 1 kg ?
The energy is emitted when two nuclei of masses m\(_1\) and m\(_2\) are fused together to make a nucleus of mass m. In this process :

If binding energy per nucleon of deuteron and \( \alpha \)-particle are 1.25 MeV and 7.4 MeV respectively, then find the value of \( Q \) in the following reaction: 

\[2  ^1_1H \rightarrow 2  ^4_2He + Q\]
Explain the nuclear fusion process. What is its example in nature? If 4 neutrons and 3 protons are fused to form lithium \( {}_3^7 \text{Li} \) nucleus, then how much energy (in MeV) will be released?
In the given nuclear reaction, X is:
\[ ^7_1N + ^1_0n \longrightarrow ^6_1C + X \]