How many time does the electron go round the first bohr orbit of hydrogen atoms in `1 s`?

Explanation

To determine how many times the electron goes around the first Bohr orbit of a hydrogen atom in 1 second, we need to calculate the frequency of the electron in that orbit.

### Step-by-Step Solution:

1. **Understand the Bohr Model**: In the Bohr model of the hydrogen atom, the electron moves in circular orbits around the nucleus. The frequency of the electron's motion can be calculated using the formula for frequency in a hydrogen atom.

2. **Frequency Formula**: The frequency \( f \) of the electron in the first Bohr orbit (n=1) is given by the formula:
\[
...