State the dimension of the nucleus from Rutherford experiment.
Explain Rutherford's explanation for scattered $\alpha $ -particles.
If in nature there may not be an element for which the principal quantum number $n > 4,$ then the total possible number of elements will be
What radioactive source did the Geiger and Marsden use in the scattering experiment?
$\alpha - $ particles of energy $400\, KeV$ are bombarded on nucleus of $_{82}Pb$. In scattering of $\alpha - $ particles, its minimum distance from nucleus will be
Discuss the experimental results of Geiger-Marsden's $\alpha $ -particle scattering.