Radio activity is due

The amount of energy absorbed or released during nuclear reaction is known as

λ -particle is represented by

Uranium series is

The splitting of a heavy nucleus into two or more smaller nuclei is termed as

The phenomenon of radioactivity was discovered by

The most penetrating radiations are

In the following radioactive decay ₉₂x²³²→ ₈₉y²²⁰, how many λ and β particles are ejected.

___________ is useful in understanding the evolution of life, and rise and fall of civilizations.