Description

We find that the way we sort our rubbish for recycling has strong links with the way the elements in them are bonded – a sort of periodic table for compounds emerges.

Recycling

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A short history of the discovery of hydrogen is given, together with its properties, uses and applications, and its importance in transport, from...

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The basic mathematics of relativity theory in a simpler way than in most textbooks, and which can be taught at age 11-18.

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