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Group 7
7 electrons in outer shell
Fluorine, Chlorine, Bromine and Iodine
Get less reactive as move down the group
Form salts called `ide' eg, chloride…read more

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Fluorine F
Yellow poisonous gas
Most reactive element
Added to toothpaste as fluoride…read more

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Chlorine Cl
Yellow/green gas
Poisonous
Added to swimming pools, makes bleach
Common salt ­ sodium chloride…read more

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Bromine Br
Red/brown liquid
One of two elements that are liquids at room
temperature
Tests for an alkene…read more

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Iodine I
Solid grey crystals
Sublimation ­ no liquid state (gas solid)
Forms yellow solution used as skin
disinfectant in hospitals
Least reactive…read more

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