The appreciable radioactivity of uranium minerals is mainly due to

If it is assumed that ${}_{92}^{235}U$ decays only by emitting $\alpha$ and $\beta$ particles,the possible product of the decay is:

The number of $\alpha-$ and $\beta-$ particles emitted when a radioactive element $_{90}E^{232}$ changes into $_{86}G^{220}$ will be

Identify $[A]$ and $[B]$ in the following reaction sequence:
${ }_{89}^{227} Ac$ $\xrightarrow{-\beta} [A]$ $\xrightarrow{-\alpha} [B]$ $\xrightarrow{-\alpha} { }_{86}^{219} Rn$

If $_{92}U^{236}$ nucleus emits one $\alpha$-particle,the remaining nucleus will have

The radiations having high penetrating power and not affected by electrical and magnetic field are