The rate of disintegration of a fixed quantity of a radioactive element can be increased by
increasing the temperature
increasing the pressure
chemical reaction
it is not possible
Radioactive element decays to form a stable nuclide, then the rate of decay of reactant $\left( {\frac{{dN}}{{dt}}} \right)$ will vary with time $(t) $ as shown in figure
What is radioactivity ?
Deuteron is a bound state of a neutron and a proton with a binding energy $B = 2.2\, MeV$. A $\gamma $ -ray of energy $E$ is aimed at a deuteron nucleus to try to break it into a (neutron + proton) such that the $n$ and $p$ move in the direction of the incident $\gamma $ -ray. If $E = B$, show that this cannot happen. Hence calculate how much bigger than $B$ must $E$ be for such a process to happen.
The half-life of $_{38}^{90} Sr$ is $28$ years. What is the disintegration rate of $15\; mg$ of this isotope?
A radioactive substance has a half-life of $1$ year. The fraction of this material, that would remain after $5$ years will be