According to the Rutherford's atomic model,the electrons inside the atom are

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

According to Richard Feynman,matter is made of which constituent particles? Why is it important? Write the atomic hypothesis.

What does it mean if the $\alpha$-particle passes through the gold foil without any deviation?

Show the trajectory of $\alpha$-particle for different impact parameters and explain how Rutherford used this to determine the upper limit of the nuclear size.

The distance of the closest approach of an alpha particle fired at a nucleus with kinetic energy $K$ is $r_{0}$. The distance of the closest approach when the $\alpha$-particle is fired at the same nucleus with kinetic energy $2K$ will be . . . . . . .