Calculate the orbital period of the electron in the first excited state of hydrogen atom.

Explanation

To calculate the orbital period of the electron in the first excited state of a hydrogen atom, we can follow these steps:

### Step 1: Identify the relevant formulas
We need to use the formulas for the radius of the nth orbit and the velocity of the electron in the nth orbit:
1. Radius of the nth orbit:
\[ r_n = 0.53 \frac{n^2}{Z} \text{ angstroms} \]
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