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Lead (Pb)
The sweetest of poisons, have we learnt how to handle this heavy metal?
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Caesium (Cs)
The caesium-based atomic clock has redefined the very meaning of time.
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Silicon
2/4 Is the element behind the computing revolution about to transform the world once again?
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Sulphur (S)
Does the world face a looming glut of this devilish yellow element?