Radioactivity

Two nuclei have mass numbers in the ratio $1:8$. The ratio of their nuclear radii would be:

The plot of the activity of a radioactive species versus time would be:

How long will a radioactive isotope, whose half life is $T$ years, take for its activity to reduce to ${\left(\frac{1}{8}\right)}^{\mathrm{th}}$ of its initial value?

Two nuclei have mass numbers in the ratio $8 : 125$. The ratio of their nuclear radii is:

Out of the two characteristics – the mass number (A) and the atomic number (Z) – of a nucleus, which one does not change during nuclear  $\beta -$ decay?

Out of the two characteristics – the mass number (A) and the atomic number (Z) – of a nucleus, which one does not change during nuclear  $\beta -$ decay?

The expression for the average life of a radionuclide that shows its relationship with the half – life would be:

The end product on the $\beta -$ decay of  ${}_{15}^{32}P$  is:

The end product of the ${\mathrm{\beta }}^{-}$ decay of ${}_{15}^{32}\mathrm{P}$ is

Which are amongst the following represent plot of the distribution of kinetic energy of $\beta -$ particles?

$\beta -$particle is emitted in a radio active reaction when

Concept of neutrino was given by,

Which of the following reaction cannot represents $\mathrm{K}-$capture.

In the process $\mathrm{K}-$capture mass number

Which of the following were not found conserved in $\mathrm{\beta }-$decay.