Three $\alpha - $ particles and one $\beta - $ particle decaying takes place in series from an isotope $_{88}R{a^{238}}$. Finally the isotope obtained will be
$_{84}{X^{220}}$
$_{86}{X^{222}}$
$_{83}{X^{224}}$
$_{83}{X^{215}}$
$_{86}{A^{222}}{ \to _{84}}{B^{210}}$. In this reaction how many $\alpha $ and $\beta $ particles are emitted
In which of the following decay, the element does not change
Before the neutrino hypothesis, the beta decay process was thought to be the transition, $n \to p + {e^ - }$ If this was true, show that if the neutron was at rest, the proton and electron would emerge with fixed energies and calculate them. Experimentally, the electron energy was found to have a large range.
Alpha particles are
Assertion : Cobalt $-60$ is useful in cancer therapy.
Reason : Cobalt $-60$ is a source of $\gamma - $ radiations capable of killing cancerous cells