Chemistry · IGCSE · Edexcel · Pearson Edexcel International GCSE (9–1) Chemistry (Linear) — 4CH1 · Specification point · 2.5 · Inorganic chemistry · Group 7 (halogens) – chlorine, bromine and iodine
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| Students should: |
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2.5 know the colours, physical states (at room temperature) and trends in physical properties of these elements |