What kind of radioactive decay does not lead to the formation of a daughter nucleus that is an isobar of the parent nucleus?

In the decay sequence:
$^{238}_{92}U$ $\xrightarrow{- x_1} ^{234}_{90}Th$ $\xrightarrow{- x_2} ^{234}_{91}Pa$ $\xrightarrow{- x_3} ^{234}_{92}Z$ $\xrightarrow{- x_4} ^{230}_{90}Th$
$x_1, x_2, x_3$ and $x_4$ are particles/radiation emitted by the respective isotopes. The correct option$(s)$ is/are-
$(1)$ $Z$ is an isotope of uranium
$(2)$ $x_2$ is $\beta^{-}$
$(3)$ $x_1$ will deflect towards negatively charged plate
$(4)$ $x_3$ is $\gamma$-ray

The $\beta$-decay of $_{11}Na^{24}$ produces an isotope of

$^{14}C$ is radioactive. The activity and the disintegration product are

Tritium,a radioactive isotope of hydrogen,emits which of the following particles?

Describe the rays emitted by radioactive elements.