The graph which depicts the results of Rutherform gold foil experiment with $\alpha$ -particales is

$\theta:$ Scattering angle

$\mathrm{Y}:$ Number of scattered $\alpha$ -particles detected

(Plots are schematic and not to scale)

An alpha particle colliding with one of the electrons in a gold atom loses

In Rutherford's experiment, number of particles scattered at $90^{\circ}$ angle are $x$ per second. Number particles scattered per second at angle $60^{\circ}$ is

Rutherford’s $\alpha$-particle experiment showed that the atoms have

Give a powerful way to determine an upper limit to the size of the electron.

Choose the correct option from the following options given below