If ${}^{235}U$ is bombarded with neutrons,the atom will split into:

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

Let $m_p$ be the mass of a proton,$m_n$ that of a neutron,$M_1$ that of a $_{10}^{20}Ne$ nucleus,and $M_2$ that of a $_{20}^{40}Ca$ nucleus. Then:

If radium and chlorine combine to form radium chloride, the compound would be

The end product of the $(4n + 2)$ radioactive disintegration series is:

Which one of the following nuclear reactions is not correct?