Atoms and Nuclei · Physics · Class 12

The ratio of the nuclear densities of two nuclei having mass numbers 64 and 125 is

The diagram shows four energy level of an electron in Bohr model of hydrogen atom. Identify the transition in which the emitted photon will have the h...

The radius of the $$\mathrm{n}^{\text {th }}$$ orbit in Bohr model of hydrogen atom is proportional

A hydrogen atom makes a transition from $$n=5$$ to $$n=1$$ orbit. The wavelength of photon emitted is $$\lambda$$. The wavelength of photon emitted wh...

The curve of binding energy per nucleon as a function of atomic mass number has a sharp peak for helium nucleus. This implies that helium nucleus is...

Draw a graph showing the variation of potential energy of a pair of nucleons as a function of their separation. Indicate the region in which the nucle...

(a) (i) Differentiate between 'distance of closest approach' and 'impact parameter'. (ii) Determine the distance of closest approach when an alpha par...

(a) What is meant by ionisation energy? Write its value for hydrogen atom. OR (b) Define the term, mass defect. How is it related to stability of the ...

(a) (i) Distinguish between nuclear fission and fusion giving an example of each. (ii) Explain the release of energy in nuclear fission and fusion on ...