If $Alpha$,$Beta$,and $Gamma$ rays carry the same momentum,which has the longest wavelength?

Consider a $\beta$ decay reaction:
${}_1^3H \to {}_2^3He + {e^{ - 1}} + \bar v$
The atomic masses of ${}_1^3H$ and ${}_2^3He$ are $3.016050 \, u$ and $3.016030 \, u$,respectively. Find the maximum possible energy of the electron in $MeV$.

Which of the following is not emitted during the radioactive decay of a radioactive element?

${}^{238}U$ has $92$ protons and $238$ nucleons. It decays by emitting an alpha particle and becomes:

When a nucleus with atomic number $Z$ and mass number $A$ undergoes a radioactive decay process:

$\beta$-decay means emission of electron from