The most stable isotope of radon is

._(11)^(23)Na is the most stable isotope of Na. Find the process by which ._(11)^(24) Na can undergo radioactive decay :

The most stable anion is:

The half life period of four isotopes (i) 6.7 yr " " (ii) 8xx10^(3) yr (iii)5760 yr " " (iv) 2*35xx10^(5) yr, The most stable isotope is

The most reactive isotope of H is:

The most stable compound is