Radioactivity is

Alpha rays emitted from a radioactive substance are:

During a $\beta^{-}$-decay,

For the given reaction, the particle $X$ is $_6C^{11} \to _5B^{11} + \beta^+ + X$.

In the nuclear reaction $_{85}X^{297} \to Y + 4\alpha$,$Y$ is:

Obtain the maximum kinetic energy of $\beta$-particles and the radiation frequencies of $\gamma$-decays in the decay scheme shown in the figure. You are given that:
$m(^{198}Au) = 197.968233 \; u$
$m(^{198}Hg) = 197.966760 \; u$