Chemistry (AS Level)·Group 17 · NSSCAS 3.4.1–3.4.2
Group 17: The Halogens
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The halogens are the Periodic Table's most reactive non-metals. Learn the colours and physical states of chlorine, bromine and iodine, how their volatility follows the intermolecular forces, how their reactivity as oxidising agents falls down the group, their reactions with hydrogen, and how the thermal stability of the hydrogen halides is explained by bond energies.
What you'll learn in this lesson
By the end you should be able to (NSSCAS Chemistry (AS Level) 3.4.1–3.4.2):
- Describe the colours of chlorine, bromine and iodine as vapours, at r.t.p. and in solution
- Describe the trend in physical state down the group and interpret volatility using intermolecular forces
- Describe the relative reactivity of the halogens as oxidising agents
- Describe and explain the reactions of the halogens with hydrogen
- Describe and explain the relative thermal stabilities of the hydrogen halides in terms of bond energies
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