Find angular momentum of an electron when it is in the second Bohr orbit of hydrogen atom.

Explanation

To find the angular momentum of an electron in the second Bohr orbit of a hydrogen atom, we can follow these steps:

### Step 1: Understand the formula for angular momentum in Bohr's model
The angular momentum \( L \) of an electron in a hydrogen atom is quantized and given by the formula:
\[ L = n \frac{h}{2\pi} \]
where \( n \) is the principal quantum number (which indicates the orbit number), and \( h \) is Planck's constant.
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