Which of the following isotopes of uranium is the most radioactive?

$_{11}^{23}Na$ is the more stable isotope of $Na$. Find out the process by which $_{11}^{24}Na$ can undergo radioactive decay.

If a radioactive isotope with atomic number $A$ and mass number $M$ emits an $\alpha$-particle,the atomic number and mass number of that new isotope will become:

What kind of radioactive decay does not lead to the formation of a daughter nucleus that is an isobar of the parent nucleus?

$^{27}_{13}A$ is a stable element. $^{29}_{13}A$ is expected to disintegrate by:

The number of $\alpha-$ and $\beta-$ particles emitted when a radioactive element $_{90}E^{232}$ changes into $_{86}G^{220}$ will be