Arrange the following elements Li, B, O, Be, N,F in the order of decreasing atomic size.

Explanation

To arrange the elements Li, B, O, Be, N, and F in the order of decreasing atomic size, we can follow these steps:

### Step 1: Identify the Elements and Their Positions
- First, we need to identify the positions of the elements in the periodic table:
- Lithium (Li) - Group 1, Period 2
- Beryllium (Be) - Group 2, Period 2
- Boron (B) - Group 13, Period 2
- Nitrogen (N) - Group 15, Period 2
...