According to the quark model,it is possible to build all the hadrons using

Which of the following pairs is an isobar?

The radius of ${ }_{29} Cu^{64}$ nucleus in Fermi is (given $R_{0}=1.2 \times 10^{-15} \ m$)

What is the approximate percentage of the total mass of an atom that is concentrated in its nucleus (in $\%$)?

The ratio of the specific charge of an $\alpha$-particle to that of a proton is

The maximum potential energy due to electrostatic repulsion between two hydrogen nuclei is nearly (radius of the nucleus $= 1.1 \ Fermi$). $\left[ \frac{1}{4 \pi \epsilon_0} = 9 \times 10^9 \ N \ m^2 \ C^{-2} \right]$ (in $MeV$)