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GCSE Chemistry · key term
The usual temperature of the surroundings; in this context it is about 20 °C.
Used by Edexcel
Specification 6.6 · Paper 2
Revise: Halogens PropertiesChlorine, bromine and iodine are halogens, found in Group 7 of the periodic table. Here, you need to recall two observable physical properties of each pure element at room temperature: its colour and whether it is a solid, liquid or gas.
For bromine, give both parts precisely: it is a dark red-brown liquid at room temperature. “Brown” alone may not gain the colour mark.
Do not describe iodine as purple at room temperature: pure iodine is a grey-black solid; its vapour is purple.
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