Among the elements of second period pick out the element
that is the most reactive non- metal.

Explanation

To determine the most reactive non-metal among the elements of the second period, we can follow these steps:

### Step 1: Identify the Non-Metals in the Second Period
The second period of the periodic table includes the following elements:
- Lithium (Li)
- Beryllium (Be)
- Boron (B)
- Carbon (C)
...