For nuclear fusion reactions, the fusion temperature is of the order of

When a slow neutron goes sufficiently close to a ${^{235}U}$ nucleus,then the process which takes place is

During the emission of a positron from a nucleus,the mass number of the daughter element remains the same but the atomic number

$A$ possible material for use in nuclear reactors as a fuel is

Which element is the end product of each natural radioactive series?

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