Question

If $r$ is the radius of the first orbit, the radius of $n^{th}$ orbit of $H-$atom is given by:

• A. $r{n}^2$
• B. $rn$
• C. $\frac{r}{n}$
• D. $r^2{n}^2$

Answer 1

The correct option is A $r{n}^2$

Radius of $n^{th}$ orbit of $H$-atom $=r_0{n}^2$
Where, $r_0=\text{radius of the first orbit}$