Write the definitions of isotopes, isobar and isotone.
Mass numbers of two nuclei are in the ratio of $4: 3$. Their nuclear densities will be in the ratio of
Assertion : Isobars are the elements having same mass number but different atomic number.
Reason : Neutrons and protons are present inside nucleus.
Choose the correct statement
How much was the radius of the nucleus estimated from the experiment of $\alpha -$ scattering ?
The deuteron is bound by nuclear forces just as $H-$ atom is made up of $p$ and $e$ bound by electrostatic forces. If we consider the force between neutron and proton in deuteron as given 1 e 2 in the form of a Coulomb potential but with an effective charge $e' \,:\,F = \frac{1}{{4\pi { \in _0}}}\frac{{e{'^2}}}{r}$ . estimate the value of $(e'/e)$ given that the binding energy of a deuteron is $2.2\, MeV.$