At room temperature, all the elements of group 17 exist in the gaseous state.

Explanation

To solve the question, we need to analyze the states of the elements in Group 17 (the halogens) at room temperature. Let's break this down step by step.

### Step 1: Identify the Elements in Group 17
Group 17 of the periodic table consists of the following elements:
- Fluorine (F)
- Chlorine (Cl)
- Bromine (Br)
- Iodine (I)
...