Group 7 Elements (Chlorine, Bromine & Iodine)
- Created by: Lucy S
- Created on: 02-04-13 12:29
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- Group 7 Elements (Chlorine, Bromine & Iodine)
- Non-metals
- Poisonous
- Physical State at Room Temperature
- Chlorine
- Gas
- Bromine
- Liquid
- Iodine
- Solid
- Chlorine
- Colour
- Bromine
- Red-brown
- Readily evaporates to form a brown gas
- Red-brown
- Chlorine
- Pale green
- Iodine
- Black
- Sublimes when heated to form a purple gas
- Black
- Bromine
- Reactions with Iron
- Bromine
- Hot iron wool glows less brightly when bromine vapour is passed over it.
- Brown smoke & brown solid are formed.
- Iron + bromine --> iron(III) bromide
- Chlorine
- Hot iron wool glows brightly whne chlorine passes over it.
- Brown smoke & brown solid are formed.
- Iron + chlorine --> iron(III) chloride
- Iodine
- Hot iron wool glows even less brightly when iodine vapour is passed over it.
- Brown smoke & brown solid are formed.
- Iron + iodine --> iron(III) iodide
- Bromine
- Reactions with Hydrogen
- Bromine
- Mild explosion if exposed to a flame.
- Hydrogen + bromine --> hydrogen bromide
- H2 + Br2 --> 2HBr
- Chlorine
- Violent explosion if exposed to a flame or to UV radiation (sunlight).
- Hydrogen + chlorine --> hydrogen chloride
- H2 + Cl2 --> 2HCl
- Iodine
- Partial reaction if heated.
- Hydrogen + iodine --> hydrogen iodide
- H2 + I2 --> 2Hl
- Bromine
- Hydrogen + chlorine --> hydrogen chloride
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