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Discovery: In Their Element: And then there was Li

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Credit: ANDREI PUNGOVSCHI / AFP / Getty Images

Lights from mobile phones in Bucharest on February, 2017

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Discovery: In Their Element

In Their Element

Professor Andrea Sella tells the stories of different elements.

Andrea Sella, Professor of Inorganic Chemistry at University College London, celebrates the art and science of chemical elements. In this episode he admires two more elements that create visual treats.
 
At the time of Emperor Napoleon the Third aluminium was more valuable than gold and silver. The Emperor liked the metal so much he had his cutlery made out of it. But once a cheaper way was discovered to extract aluminium it began to be used for all kinds of objects, from aeroplanes to coffee pots. Andrea talks to Professor Mark Miodownik at the Institute of Making at UCL about why aluminium is such a useful material, from keeping crisps crisp to the tinsel on our Christmas trees. Andrea visits the Science Museum where he admires an aluminium plane of the class flown by Amelia Earhart. And he talks about the lightness of bicycles made from aluminium with Keith Noronha, of Reynolds Technology.
 
Strontium is the 15th most common element in the earth yet we really only come into contact with it in fireworks. It gives us the deep red colour we admire in a pyrotechnics display. Andrea Sella, Professor of Inorganic Chemistry at UCL, meets Mike Sansom of Brighton Fireworks who explains how a firework is constructed and reveals the chemical mix that creates the bright red flashes.
Professor Thomas Klap�tke of the Ludwig-Maximilians University in Munich talks about his search for a substitute for strontium in fireworks and about how the element can get into our bones.
And Janet Montgomery, Professor of Archaeology at Durham University, explains how strontium traces have revealed that our Neolithic ancestors moved around much more than was previously thought. Nearly half the people buried around Stonehenge in Southern England were born in places with different rocks from those under Salisbury Plain.

07/08/2017 GMT

And then there was Li

BBC World Service - Discovery, In Their Element, And then there was LiSearch BBC

The element that links the formation of the universe with the functioning of our brains

From the origins of the universe, though batteries, glass and grease to influencing the working of our brains, Neuroscientist Sophie Scott tracks the incredible power of Lithium.

From the origins of the universe, though batteries, glass and grease to influencing the working of our brains, neuroscientist Sophie Scott tracks the incredible power of lithium.

It's 200 years ago this year that lithium was first isolated and named, but this, the lightest of all metals, had been used as a drug for centuries before. 

From the industrial revolution it proves its worth as a key ingredient in glass and grease, and as the major component in lithium ion batteries it powers every smartphone on the planet. 

In mental health lithium has proved one of the most effective treatments. And its use to treat physical ailments is now making a comeback.

We explore how the chemistry of lithium links all these apparently unrelated uses together.

Main Image: Lights from mobile phones in Bucharest on February, 2017.  Credit: ANDREI PUNGOVSCHI / AFP / Getty Images )

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