Whenever the parent nucleus emits a $\beta^{-}$ particle,the daughter element is shifted in the periodic table:

In the reaction $Po$ $\xrightarrow{-\alpha} Pb$ $\xrightarrow{-\beta} Bi$,if $Bi$ belongs to group $15$,to which group does $Po$ belong?

$Nd$ $(Z = 60)$ is a member of group $3$ in the periodic table. An isotope of it is $\beta$-active. The daughter nuclei will be a member of Group $...$ ...

$A$ nuclide of an alkaline earth metal undergoes radioactive decay by emission of two $\alpha$-particles in succession. The group of the periodic table to which the resulting daughter element would belong is $Group$ .......

Group displacement law states that the emission of $\alpha$ or $\beta$ particles results in the daughter element occupying a position,in the periodic table,either to the left or right of that of the parent element. Which one of the following alternatives gives the correct position of the daughter element?

On emission of $\alpha$ particles

On emission of $\beta$ particles

The group displacement law was given by: