If half-life of a radioactive atom is $2.3\, days$, then its decay constant would be
$0.1$
$0.2$
$0.3$
$2.3$
(c) $\lambda = \frac{{0.693}}{{{T_{1/2}}}} = \frac{{0.693}}{{2.3}} = 0.3$
Starting with a sample of pure ${}^{66}Cu,\frac{7}{8}$ of it decays into $Zn$ in $15\, minutes$. The corresponding half life is……….$minutes$
Half life of radioactive element depends upon
A radioactive sample consists of two distinct species having equal number of atoms initially. The mean life time of one species is $\tau$ and that of the other is $5 \tau$. The decay products in both cases are stable. A plot is made of the total number of radioactive nuclei as a function of time. Which of the following figures best represents the form of this plot
A sample contains $10^{-2}\, kg$ each of two substances A and $B$ with half lives $4 \,s$ and $8 \,s$ respectively. The ratio of then atomic weights is $1: 2$ The ratio of the amounts of $A$ and $B$ after $16 \,s$ is $\frac{x}{100}$. the value of $x$ is……..
The decay constant of the end product of a radioactive series is
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