Physical Properties — Colour and State at Room Temperature
This key facts covers Physical Properties — Colour and State at Room Temperature within Group 7: Halogens for GCSE Chemistry. Revise Group 7: Halogens in Atomic Structure for GCSE Chemistry with 22 exam-style questions and 21 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 5 of 12 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 5 of 12
Practice
22 questions
Recall
21 flashcards
📌 Physical Properties — Colour and State at Room Temperature
Halogens exist as diatomic molecules (pairs of atoms: F₂, Cl₂, Br₂, I₂)
| Halogen | Colour | State at RT |
|---|---|---|
| Fluorine (F₂) | Pale yellow | Gas |
| Chlorine (Cl₂) | Yellow-green | Gas |
| Bromine (Br₂) | Orange/brown | Liquid |
| Iodine (I₂) | Grey/purple vapour | Solid |
Trends down the group:
- Colour gets darker
- Melting/boiling points increase (gas → liquid → solid)
- Reactivity decreases
Keep building this topic
Read this section alongside the surrounding pages in Group 7: Halogens. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Group 7: Halogens
How many electrons do halogens have in their outer shell?
Explain why chlorine is more reactive than bromine.
Quick Recall Flashcards
22 questions on Group 7: Halogens — practise free
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