The reaction $_5B^8 \to _4Be^8 + _1e^0$ is due to

In the radioactive decay $_{92}X^{232} \to _{89}Y^{220}$,how many $\alpha$ and $\beta$-particles are ejected from $X$ to form $Y$?

Which of the following isotopes of uranium is the most radioactive?

The element with atomic number $84$ and mass number $218$ changes to another element with atomic number $84$ and mass number $214$. The number of $\alpha$ and $\beta$-particles emitted are respectively:

When a radioactive element emits an electron,the daughter element formed will have:

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