`nto`Orbit no , `zto` Atomic no `implies r_(n.z)to` Radius `v_(n.z)to` Velocity
`T_(n.z)to` Time period of Revolution `implies K_(n.z)to` kinetic energy of the electron
`{:("Column-I","Column-II"),("(for single electron species)","(Ratio)"),((A)r_(2,1):r_(1,2),(P)"9:1"),((B)V_(1,3):V_(3,1),(Q)"8:1"),((C )T_(1,2):T_(2,1),(R)"16:1"),((D)K_(1,2):K_(2,1),(S) "1:32"):}`

Answer

A`to`Q ; B`to`P ; C`to`S ,D`to`R

Explanation

(i)`r=0.521xxn^2/z A^@` , (ii)`V=2.18xx10^6 z//n` , (iii)`T prop n^3//z^2` , (iv)`K.E prop z^2/n^2`