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Science

Elements

Updated 2 days ago

Science
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A close look at chemical elements, the basic building blocks of the universe. Where do we get them, what do we use them for and how do they fit into our economy?

Read more

A close look at chemical elements, the basic building blocks of the universe. Where do we get them, what do we use them for and how do they fit into our economy?

iTunes Ratings

92 Ratings
Average Ratings
83
6
2
1
0

Amazing

By MTF: Commander BoB - Nov 04 2019
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Why did they stop at 2016 this show was great

More elements please

By Bobnky - Jun 27 2014
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Great podcast, please, please, continue.

iTunes Ratings

92 Ratings
Average Ratings
83
6
2
1
0

Amazing

By MTF: Commander BoB - Nov 04 2019
Read more
Why did they stop at 2016 this show was great

More elements please

By Bobnky - Jun 27 2014
Read more
Great podcast, please, please, continue.
Cover image of Elements

Elements

Updated 2 days ago

Read more

A close look at chemical elements, the basic building blocks of the universe. Where do we get them, what do we use them for and how do they fit into our economy?

Rank #1: Helium (He)

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The second most abundant element in the universe, helium is rare on Earth. In liquid form it is used as a coolant in super conducting magnets in MRI scanners – so should this rare element be used in something as frivolous as party balloons? And what happens to the helium when that balloon inevitably escapes the clutch of a small child?

(Picture: US National Helium Reserve; Credit: Jonny Dymond/BBC)

Jul 12 2014

23mins

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Rank #2: Aluminium (Al)

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Light, strong and flexible, aluminium is used in drinks cans, window frames, aircraft and packaging. Ubiqitous today, why was it valued more highly than gold 150 years ago? Is it better to recycle this metal, or spend vast amounts of energy creating more of it from scratch? And why is Jaguar Landrover teaching robots to rivet?

Jul 13 2014

27mins

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Rank #3: Magnesium (Mg)

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This metal played a part in the worst car crash in history, the 1955 Le Mans disaster, helping to make the resulting inferno explosively dangerous. Yet despite its fiery reputation, and its proneness to corrosion, magnesium has regained its historic role in making planes and cars lighter and more efficient. Presenter Laurence Knight visits Magnesium Elektron, the company behind the alloy used in the ill-fated Le Mans car, to find out how a new breed of alloys has exorcised the demon's in this metal's past. We also hear from researcher Kristin Persson about an entirely new role magnesium could play in the car industry - as an even lighter and more compact replacement for lithium-ion batteries in electric vehicles.

(Picture: Magnesium alloy flame test; Credit: Magnesium Elektron)

Sep 30 2015

34mins

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Rank #4: Gallium & Indium (Ga, In)

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LED lighting, solar power and lasers are just some of the electronics revolutionised by two obscure chemical elements - gallium and indium. Laurence Knight hears from Mike Simpson of Philips why we will only need to replace our lightbulbs once every two decades, and travels to Sheffield University where research centre head Jon Heffernan explains what on earth III-V materials are and why making an LED is like baking a pizza. Meanwhile chemistry stalwart Prof Andrea Sella of UCL demonstrates these two metals' surprisingly buttery melt-in-the-mouth properties. (Photo: Times Square New Year's Eve ball, Credit: Jeff Zelevansky/Getty Images)

Jun 03 2015

49mins

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Rank #5: Iron (Fe) - the Industrial Revolution

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In the first of three programmes about iron, Justin Rowlatt explores two moments in industrial history that transformed this most abundant of metal elements into the key material out of which modern life is constructed. And they both took place right here in the British Isles.

Mar 18 2015

32mins

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Rank #6: Technetium (Tc)

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Technetium is essential for medical imaging, yet supplies of this short-lived manmade element are far from guaranteed. We see a technetium scan in progress and a cow being milked, and hear the yarn of the 70-year chemistry wild goose chase sparked by this mysterious radioactive metal.

Mar 11 2015

31mins

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Rank #7: Mercury (Hg)

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Mercury is beautiful, yet deadly poisonous. Known as quicksilver, the Minamata international treaty aims to phase its use out completely. But how will the ban on element 80 affect artisanal gold miners? Or coal-fired power stations? And why does so much of this liquid metal end up in tuna and swordfish?

(Picture: Ghanaian artisanal miner holds mercury in his hand; Credit: Matt Davies/BBC)

Jul 14 2014

23mins

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Rank #8: Copper (Cu) - electricity

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Copper has long been the metal of electricity generators and wiring. But presenter Justin Rowlatt asks whether new technologies herald the death of the old-fashioned electricity grid. Prof Andrea Sella of University College London explains the special properties of element 29 of the periodic table that mean that half of the world's mined copper is used to conduct electricity. Justin travels to the rapidly growing Indian city of Gurgaon to ask Jasmeet Khurana of solar consultancy Bridge to India what his government's plans to increase solar power a hundredfold mean for the best way to build the country's electricity grid. Electricity entrepreneur Simon Daniel of Moixa Technology argues that solar power and battery technology could transform the century-old debate between Tesla and Edison over AC vs DC power. And Zolaikha Strong of the Copper Development Association says the transition to renewable energy means the world will still need plenty more of the metal. (Photo: Copper cable, Credit: Yukosourov/Thinkstock)

Jun 25 2015

38mins

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Rank #9: Cobalt (Co)

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Cobalt, the metal in magnets and phone batteries, is synonymous with the colour blue. But what exactly are magnets, how do they work and where are they used? And is some of the cobalt being mined by children? Presenter Laurence Knight hears from chemistry professor Andrea Sella of University College London why a permanent magnet is like a flock of birds, and he travels to Arnold Magnetics near Sheffield where manager Martin Satyr explains how magnets are used in everything from recovering the heat energy from sportscar engines to recycling your trash. Also in the programme, Mark Dummett of Amnesty International, back from Katanga in southern Congo - source of half the world's cobalt - tells of his concerns about the conditions in which artisanal miners work, including children. And David Weight of the Cobalt Development Institute explains what the industry is doing to ensure it knows where its cobalt is coming from. (Photo: Andrea Sella picking up lumps of cobalt with a magnet; Credit: Laurence Knight)

Jul 22 2015

46mins

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Rank #10: Lead (Pb)

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Lead is the sweetest of poisons, blamed for everything from mad Roman emperors to modern-day crime waves. Yet a lead-acid battery is still what gets your car going in the morning. So have we finally learnt how to handle this heavyweight element? Justin Rowlatt travels to arts shop Cornelissen in London's Bloomsbury to find out why they have stopped stocking lead paints, and hears from professor Andrea Sella of University College London about the unique properties that have made this metal so handy in everything from radiation protection to glassware.
Yet lead in petrol is also accused of having inflicted brain damage on an entire generation of children in the 1970s, as the economist Jessica Wolpaw-Reyes of Amherst College explains. And, producer Laurence Knight travels to one of the UK's only two lead smelters - HJ Enthoven's at Darley Dale in Derbyshire, the historical heartland of the UK lead industry - to see what becomes of the lead in your car battery. And, we speak to the director of the International Lead Association, Andy Bush.

Oct 01 2014

38mins

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Rank #11: Beryllium (Be)

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Rare and toxic, beryllium can do serious damage to your lungs. Presenter Laurence Knight explores whether and how we can make use of this metal safely. Prof Andrea Sella of University College London explains why beryllium's surprising scarcity is the very reason it can be so harmful to the body. Gianna Palmer reports from the Hanford nuclear site in Washington State on this chemical element's intimate and poisonous history in the US nuclear weapons programme. And we hear from IBC Advanced Alloys, a company that claims to have a novel, cheap - and safe - way of producing aeroplane parts out of beryllium-aluminium.

Image: A man holding a shockproof X-ray tube - Beryllium is used in the construction of these. Credit: Douglas Miller/Topical Press Agency/Getty Images

Oct 22 2015

21mins

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Rank #12: Boron (B)

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Boron is the mineral from the Wild West that stops glass from shattering and stops bullets in their tracks. Presenter Laurence Knight visits the Dixon Glass works to see why borosilicate glass is perfect for making chemistry equipment and much of the glassware we use in our day-to-day lives. Professor Andrea Sella demonstrates how this element puts the flub into flubber. Colin Roberson, founder of body armour firm Advanced Defence Materials, explains why being shot is like standing at the bottom of a volcano. And the BBC's Kim Gittleson travels to the deserts of California where the modern-day story of boron first began. (Photo: Boron, California, Credit: Kim Gittleson/BBC)

Jun 11 2015

42mins

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Rank #13: Fluorine (F)

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Itself a ferocious yellow gas, fluorine is also the key building block for a string of other gases that pose a threat to mankind - from the ozone-depleting CFCs to potent greenhouse gases. We track fluorine from the mine to its incredible array of final uses. And we find out why an exploding Mercedes car has caused a trans-Atlantic chemistry tiff.

Mar 04 2015

42mins

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Rank #14: Uranium (U)

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Uranium is the fuel for nuclear power stations, which generate carbon-free electricity, but also radioactive waste that lasts a millennium. In the latest in our series looking at the world economy from the perspective of the elements of the periodic table, Justin Rowlatt travels to Sizewell in Suffolk, in a taxi driven by a former uranium prospector.
He is given a tour of the operational power station, Sizewell B, which generates 3% of the UK's electricity, by EDF's head of safety Colin Tucker, before popping next-door to the original power station, Sizewell A, where he speaks to site director Tim Watkins about the drawn-out process of decommissioning and cleaning up the now-defunct reactors.
But while Sizewell remains reassuringly quiet, big explosions come at the end of the programme. We pit environmentalist and pro-nuclear convert Mark Lynas against German Green politician Hans-Josef Fell, the joint architect of Germany's big move towards wind and solar energy, at the expense of nuclear. Is nuclear a green option? It really depends whom you ask.
(Photo: Perdiodic table)

Oct 08 2014

41mins

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Rank #15: Tin (Sn)

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Tin may seem old-fashioned, but it plays some surprisingly important roles in the modern economy. Presenter Justin Rowlatt meets our favourite chemist Andrea Sella of UCL at Pewters' Hall in London to discover the unique properties of the metal that sparked the Bronze Age.
He discovers the metal's role in plastics and electronics, and visits the giant Pilkington glass factory to find out how tin revolutionised the glass-making industry. And he meets two very venerable tin chemists, Alwyn Davies and Ted Fletcher.

Jul 18 2014

31mins

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Rank #16: Tungsten (W)

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Tungsten is one of the hardest, heaviest and highest melting metals, used in everything from bulbs to bullets, x-rays to drill bits. Justin Rowlatt hears from the perennial Professor Andrea Sella of University College London about the properties of what is one of the densest of elements.

We get a tour of the SGS Carbide tool factory with managing director Alan Pearce, and we consider the market value of this very useful element with Mark Seddon, head of consultancy firm Tungsten Market Research.
Should we worry that China dominates demand? And why is it taking so long to open up new sources? We visit the Hemerdon mining project in the pretty English county of Devon, and hear from Russell Clark, head of the mining firm Wolf Minerals that is reopening it.
And, there is a very special reason why your government should care about its tungsten supplies, as military technology analyst Robert Kelley explains.
(Picture: Soldier lays armour-piercing sabot round on the ground during Operation Desert Shield; Credit: US Department of Defense)

Jul 29 2014

34mins

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Rank #17: Titanium (Ti) - catalysts

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Titanium is the magic metal that made possible the mass production of plastics and paints, as well as buildings that clean both themselves and the air around them.

Presenter Laurence Knight heads to the Ineos oil refinery in Grangemouth, Scotland, to see how just a smidge of a titanium-based catalyst transforms a type of natural gas into the stuff of food packaging, bottles and car bumpers.

He hears from Prof Andrea Sella why most of us spend our lives surrounded by titanium without even realising it.

And Brian Pickett of pigments manufacturer Cristal explains why his company has been painting various bits of London to further the fight against city smog.

(Picture: Window cleaner; Credit: Peter Parks/Getty Images)

Sep 16 2015

28mins

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Rank #18: Rare Earth Elements (Ce, Nd, Dy, Er, etc)

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Neither rare nor earths, these 17 elements are nonetheless difficult and unpleasant to mine and refine. Chemically near-identical, these metals have unique magnetic and optical properties, making them essential in modern technology from fibre optics to wind turbines. So should we worry about China's stranglehold over their supply?
(Picture: 20 euro note glows under an ultraviolet light; Credit: Frans Dekkers/Thinkstock)

Jul 21 2014

32mins

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Rank #19: Lithium (Li)

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Lithium is the electro-chemical element - big in batteries and bipolar disorder. Over two decades it has shot from obscurity to become almost synonymous with the way we power our gadgets. Presenter Justin Rowlatt hears from chemistry powerhouse professor Andrea Sella of University College London about what makes lithium so light and energetic. We hear from Gideon Long in Chile, who visits the world's richest source of lithium in the Atacama Desert, and about how neighbouring Bolivia believes it will dominate supply if demand for this alkali metal continues to see double-digit growth. Justin speaks to professor Nigel Brandon of Imperial College, an expert on cutting-edge battery research, about whether lithium can ever realistically hope to challenge a can of petrol as the best way to power a car. And, we hear from clinical psychologist Kay Redfield Jamison of Johns Hopkins University about the literally life-saving role lithium has played for sufferers of bipolar disorder - including herself. (Picture: Salar de Atacama; Credit: Gideon Long)

Jul 22 2014

32mins

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Rank #20: Carbon (C) - energy

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Carbon is a great energy store – in plants and animals, but also as hydrocarbons – coal, oil and natural gas. From the Industrial Revolution onwards, burning these fossil fuels has released vast quantities of carbon dioxide into the air, affecting our climate and oceans. So can we ever get by without carbon-based energy?

Jul 16 2014

26mins

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