A radioactive element P emits one α-particle and transforms to a new element Q. What will be the position of the element Q in the periodic table?

Two groups to the left of P

Reason — The reaction is :

$$\begin{aligned}_{\text Z}^{\text A}\text{P}\ \longrightarrow \\ _{\text Z - 2}^{\text A - 4}\text{Q}\ + \\ _{2}^{4}\text{He}\end{aligned}$$

In periodic table elements are arranged in ascending order of atomic number and the atomic number of Q is 2 less than that of P. Hence, position of Q will 2 groups left of P.