Question

The radii of two of the first four bohr orbits of hydrogen atom is 1:4 the energy difference between them may be

Answer 1

we know that r will depend on n2/z here n is no. of shell and z is atomic no.

so if z is constant then it will only depend on n2

so r1:r2= n2:n2
n1:n2= 1:2

so atom will move on 1 shell to 2 shell

and energy difference between E1 and E2 is -10.4ev
(because E1=-13.6ev and E2=-3.4)
so differnce is -10.4ev

hope it help you!!!