Which of the following isotopes is used for the treatment of cancer
${K^{40}}$
$C{o^{60}}$
$S{r^{90}}$
${I^{131}}$
Radius of the second Bohr obit of singly ionised helium atom is ......... $Å$
Two nucleons are at a separation of $1 \times {10^{ - 15}}m$. The net force between them is ${F_1}$, if both are neutrons, ${F_2}$ if both are protons and ${F_3}$ if one is a proton and other is a neutron. In such a case
If radius of the $^{27}_{13}Al$ nucleus is taken to be $R_{Al}$, then the radius of $^{125}_{53}Te$ nucleus is nearly
A nucleus disintegrates into two nuclear parts, in such a way that ratio of their nuclear sizes is $1: 2^{1 / 3}$.Their respective speed have a ratio of $n: 1$. The value of $n$ is $.....$.
A nucleus ruptures into two nuclear parts which have their velocity ratio equal to $2 : 1$. What will be the ratio of their nuclear size (nuclear radius)