The nuclei ${ }_{6} C^{13}$ and ${ }_{7} N^{14}$ can be described as
isotopes of nitrogen
isotopes of carbon
isobars
isotones
$\pi $ mesons can be
A nucleus of mass number $189$ splits into two nuclei having mass number $125$ and $64$ . The ratio of radius of two daughter nuclei respectively is:
Two protons exerts a nuclear force on each other, the distance between them is
If radius of the $^{27}_{13}Al$ nucleus is taken to be $R_{Al}$, then the radius of $^{125}_{53}Te$ nucleus is nearly
Explain isotopes, isobar, isotones and isomers by giving examples.