Arrange the as per he instruction given in the bracket:
`Br, F,Cl` [decreasing order of atomic radius]

Explanation

To arrange the elements Br, F, and Cl in decreasing order of atomic radius, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Elements and Their Group**:
- The elements given are Bromine (Br), Chlorine (Cl), and Fluorine (F).
- All these elements belong to Group 17 of the periodic table, which is known as the halogens.

...