All International year of the periodic table articles – Page 3
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FeatureThe discovery of the noble gases
How an extra line in the solar spectrum kicked off a search for the ‘missing metals’ that turned out to be noble gases
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OpinionWhose periodic table is it anyway?
Dmitri Mendeleev’s table was not the first – but it’s the one that matters
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OpinionIs this the world’s oldest classroom periodic table?
How a chart of elements from 1885 was found, rescued and restored
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FeatureWhat is an element?
Our understanding of what an element is has evolved over the years, but it’s still a tricky concept to nail down. Philip Ball investigates
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FeatureThe discovery of graphene
Read how Andre Geim’s Friday night experiments led to the discovery of graphene, a single layer of carbon atoms
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FeatureThe father of the periodic table
Mike Sutton looks at how Mendeleev’s patience revealed periodicity in the elements
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