The decay constant of a radioactive element is $0.01$ per second. Its half life period is .......$sec$
$693$
$6.93$
$0.693 $
$69.3 $
(d) ${t_{1/2}} = \frac{{0.6931}}{{0.01}} = 69.31\,seconds.$
If $10\%$ of a radioactive material decays in $5$ days, then the amount of original material left after $20$ days is approximately ……………$\%$
Explain the $\alpha -$ decay process and give its appropriate example
The half life of a radioactive substance against $\alpha – $ decay is $1.2 \times 10^7\, s$. What is the decay rate for $4.0 \times 10^{15}$ atoms of the substance
Two radioactive substances $X$ and $Y$ originally have $N _{1}$ and $N _{2}$ nuclei respectively. Half life of $X$ is half of the half life of $Y$. After three half lives of $Y$, number of nuclei of both are equal. The ratio $\frac{ N _{1}}{ N _{2}}$ will be equal to
A sample of radioactive element containing $4 \times 10^{16}$ active nuclei. Half life of element is $10$ days, then number of decayed nuclei after $30$ days is …….. $\times 10^{16}$
Confusing about what to choose? Our team will schedule a demo shortly.
