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

\frac{3 h}{2 π}

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\frac{9 h}{2 π}

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\frac{h}{2 π}

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\frac{3 h}{6 π}

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Solution

The correct option is C $\frac{h}{2 π}$
Using Bohr's quantization of angular momentum:
$m v r = \frac{n h}{2 π}$
For $n = 1$ $\to m v r = \frac{h}{2 π}$

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