Neutrino is a particle which
Has no charge and no spin
Has no charge but has spin
Is charged like an electron and has spin
Has no charge but has mass nearly equal to that of a proton
Actinium $231$, ${}^{231}A{c_{89}}$, emit in succession two $\beta - $particles, four alphas, one $\beta $ and one alpha plus several $\gamma $ rays. What is the resultant isotope
In the given nuclear reaction, the element $X$ is :
${ }_{11}^{22} Na \rightarrow X + e ^{+}+v$
Suppose a ${ }_{88}^{226} Ra$ nucleus at rest and in ground state undergoes $\alpha$-decay to a ${ }_{56}^{22} Rn$ nucleus in its excited state. The kinetic energy of the emitted $\alpha$ particle is found to be $4.44 MeV$. ${ }_{86}^{22} Rn$ nucleus then goes to its ground state by $\gamma$-decay. The energy of the emitted $\gamma$-photon is. . . . . . . .$keV$,
[Given: atomic mass of ${ }_{ gs }^{226} Ra =226.005 u$, atomic mass of ${ }_{56}^{22} Rn =222.000 u$, atomic mass of $\alpha$ particle $=4.000 u , 1 u =931 MeV / c ^2, c$ is speed of the light $]$
$^{22}Ne$ nucleus after absorbing energy decays into two $\alpha - $ particles and an unknown nucleus. The unknown nucleus is
When a nucleus with atomic number $Z$ and mass number $A$ undergoes a radioactive decay process :