A nuclear reaction given by $_Z{X^A}\, \to {\,_{Z + 1}}{Y^A}{ + _{ - 1}}{e^0} + \bar p$ represents
$\gamma-$ decay
Fusion
Fission
$\beta-$ decay
The electron emitted in beta radiation originates from
An element $A$ decays into element $C$ by a two step process :
$A \to B + {\;_2}H{e^4}$
$B \to C + \;2{e^ - }$
Then
When a nucleus with atomic number $Z$ and mass number $A$ undergoes a radioactive decay process :
If a heavy nucleus has $N / Z$ ratio higher than that required for stability, then
Which of the following will have highest penetrating power