# In Bohr’s hydrogen atomic model, the radius of the stationary

orbit is directly proportional to (n = principal quantum number)

1. n2
2. n-2
3. 2n2
4. 3n3

## In Bohr’s hydrogen atomic model, the radius of the stationary orbit is directly proportional to

In Bohr’s hydrogen atomic model, the radius of the stationary orbit is directly proportional to n2.

$\mathbf{r_{n}&space;=&space;0.53&space;\frac{n^{2}}{z}A^{0}}$
⇒  $\mathbf{r_{n}&space;\propto&space;\frac{n^{2}}{z}}$