Comment on the colour of group 17 elements.

Explanation

**Step-by-Step Text Solution:**

1. **Identify Group 17 Elements**: Group 17 of the periodic table is known as the halogen family. The elements in this group include fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

2. **Describe the Color of Fluorine**: Fluorine is a pale yellow gas. This means that when fluorine is in its gaseous state, it has a light yellow color.

3. **Describe the Color of Chlorine**: Chlorine is a greenish-yellow gas. This indicates that chlorine gas has a color that is a mix of green and yellow.

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