Pauli suggested the emission of nutrino during $\beta^{+}$decay to explain
Continuous energy distribution of positrons
Conservation of linear momentum
Conservation of mass-energy
All of these
A deutron is bombarded on $_8{O^{16}}$ nucleus and $\alpha$-particle is emitted. The product nucleus is
${ }_{92}^{238} U$ atom disintegrates to ${ }_{84}^{214} Po$ with a half of $45 \times 10^9$ years by emitting $\operatorname{six} \alpha-$ particles and $n$ electrons. Here, $n$ is
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
A nuclear reaction is given by
${}_Z{X^A} \to {}_{Z + 1}{Y^A} + {}_{ - 1}{e^0} + \bar v$ , represents
The radioactive decay of uranium into thorium is expressed by the equation $_{92}^{238}U \to _{90}^{234}Th + X,$ where $'X'$ is