Chemistry - Atomic Structure Question with Solution | TestHub

First Bohr orbit of $\mathrm{H}$ atom has radius $$\mathrm{r}=0.529\mathring{A}$$ Also, the angular momentum is quantised. $$\begin{array}{rl}& \mathrm{mvr}=\frac{\mathrm{h}}{2\pi }\\ & 2\pi \mathrm{r}=\frac{\mathrm{h}}{\mathrm{mv}}=\lambda \\ & \lambda =2\pi \times 0.529\mathring{A}\end{array}$$