Question

The angular momentum of an electron in the first orbit of $L{i}^{++}$ ion is

• A. $\frac{3h}{2\pi }$
• B. $\frac{9h}{2\pi }$
• C. $\frac{h}{2\pi }$
• D. $\frac{3h}{6\pi }$

Answer 1

The correct option is C $\frac{h}{2\pi }$

Using Bohr's quantization of angular momentum:
$mvr=\frac{nh}{2\pi }$
For $n=1$ $\to mvr=\frac{h}{2\pi }$