Identify the correct increasing order of $e/m$ ratio for the following particles: $n, p, e, \alpha$.

The average distance of an electron in an atom from its nucleus is of the order of:

Who discovered the charge of an electron? State the charge and mass of an electron.

The nucleus and an atom can be assumed to be spherical. The radius of the nucleus of mass number $A$ is given by $R_n = 1.25 \times 10^{-13} \times A^{1/3} \, \text{cm}$. The atomic radius is $1 \, \mathring{A}$. If the mass number is $64$,the fraction of the atomic volume that is occupied by the nucleus is:

What is a kernel in the context of atomic structure?

The discovery of ......... was made through Rutherford's scattering experiment.