The radioactive decay of $_{35}X^{88}$ by a beta emission produces an unstable nucleus which spontaneously emits a neutron. The final product is

In the decay,${}_Z^AX \to {}_{6}^{12}C + {}_{+1}^{0}\beta$,identify the values of $A$ and $Z$.

The isotopic mass of ${}_{3}^{7}Li$ is $7.016005 \ u$ and those of the $H$ atom and neutron are respectively $1.007825 \ u$ and $1.008665 \ u$. Then,the binding energy of the ${}_{3}^{7}Li$ nucleus is: (in $MeV$)

Sulphur $-35$ $(34.96903 \ amu)$ emits a $\beta -$ particle but no $\gamma -$ rays,the product is chlorine $-35$ $(34.96885 \ amu)$. The maximum energy emitted by the $\beta -$ particle is (in $MeV$)

Ordinary water is not used as a moderator in nuclear reactors because

The atomic mass of lead is $208$ and atomic number is $82$. The atomic mass of bismuth is $209$ and atomic number is $83$. The ratio of $n/p$ in the atom is