. The Bohr orbit radius for the hydrogen atom
(n=1) is approximately 0.530Å. The radius for the first excited state (n=2) orbit is (in Åˆ )
Correct Option is :(d) R= kn2/z.
Putting the value of R, n and z. We get the value of k as 0.53Åˆ
Substituting it for n=2, we get
R= 0.53 22/1
Hence the correct answer is option 4.