NCERT Solutions for Chapter: Structure Of The Atom, Exercise 3: Long Answer Questions

The ratio of the radii of hydrogen atom and its nucleus is $~{10}^5$. Assuming the atom and the nucleus to be spherical, what will be the ratio of their sizes?

The ratio of the radii of hydrogen atom and its nucleus is $~{10}^5$. Assuming the atom and the nucleus to be spherical, if atom is represented by planet earth $\text{'}\mathrm{Re}\text{'} = 6.4\times {10}^6 \mathrm{m}$, estimate the size of the nucleus. 

Enlist the conclusions drawn by Rutherford from his $\alpha$-ray scattering experiment. 

In what way is the Rutherford's atomic model different from that of Thomson's atomic model? 

What were the drawbacks of Rutherford's model of an atom?

What are the postulates of Bohr's model of an atom? 

Show diagrammatically, the electron distributions in sodium atom and sodium ion, and also give their atomic number.

In the Gold foil experiment of Geiger and Marsden, that paved the way for Rutherford's model of an atom, $~ 1.00 \%$ of the $\alpha$ -particles were found to deflect at angles $>50°$ If one mole of $\alpha$-particles were bombarded on the gold foil, compute the number of $\alpha$-particles that would deflect at angles less than $50°$ .