In the treatment of cancer,which of the following isotopes is used?

$_{35}X^{88}$ is an unstable isotope,which decays in two successive steps to produce the stable isotope $_{32}Z^{84}$ as $_{35}X^{88}$ $\xrightarrow{I} Y$ $\xrightarrow{II} _{32}Z^{84}$. The correct statement is (possible emissions are $\alpha, \beta^-$,positron,neutron,and $_1H^1$,and in each step only one particle is involved).

Which of the following sets of nuclei represents a triad of isotones?

Which radioactive carbon isotope has been helpful in understanding the mechanism of photosynthesis in plants?

Which of the following pairs of nuclides is an example of isotones?

An element $A$ emits an $\alpha$-particle and forms $B$. $A$ and $B$ are