The atomic number of a radioactive element increases by one unit in:

The element used for dating the ancient remains is

An element with atomic number $84$ and mass number $218$ loses one $\alpha$-particle and two $\beta$-particles in three successive stages. The resulting element will have:

The $_{88}Ra^{226}$ is

Which of the following processes does not occur via $\alpha$-decay?

The number of $\alpha$ and $\beta$-particles emitted in the nuclear reaction $_{90}^{228}Th \to _{83}^{212}Bi$ are respectively: