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Sat 12 May 2012, 1:30,
archived)
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Sat 12 May 2012, 1:34,
archived)
A whole section on the halogens. There's a rather lovely little experiment with a blob of liquid bromine in a sealed glass tube. Hold the tube and the heat from your hands cause the bromine to turn to vapour which fills the tube. Put it down again and it recondenses.
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Sat 12 May 2012, 1:42,
archived)
That's how wonderful science is. Someone has the word printed on their body.
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Sat 12 May 2012, 2:31,
archived)