If $t_{1/2}$ is the half life of a substance then $t_{3/4}$ is the time in which substance
Decays $\frac{3}{4}^{th}$
Remains $\frac{3}{4}^{th}$
Decays $\frac{1}{2}$
Remains $\frac{1}{2}$
A radioactive reaction is $_{92}{U^{238}}{ \to _{82}}P{b^{206}}$. How many $\alpha $ and $\beta $ particles are emitted
The activity of a sample of a radioactive material is ${A_1}$ at time ${t_1}$ and ${A_2}$ at time ${t_2}$ $({t_2} > {t_1}).$ If its mean life $T$, then
Explain the $\alpha -$ decay process and give its appropriate example
Alpha rays emitted from a radioactive substance are
A radioactive sample decays by $\beta$ -emission. In first two seconds $‘n’$ $\beta$ -particles are emitted and in next $2\ seconds$ , $‘0.25n’$ $\beta$ -particles are emitted. The half life of radioactive nuclei is ...... $sec$