Question

If r is radius of first orbit, the radius of nth orbit of the H atom will be :

• A. rn${}^2$
• B. rn
• C. r/n
• D. r${}^2$n${}^3$

Answer 1

The correct option is A rn${}^2$

According to Bohr's Model:
r $\propto n^2/Z$
So, radius of nth orbit is $r_n=r{n}^2$, as Z=1 for H atom.