Radioactives (Po, Ra, Rn)
Elements9 Maalis 2016

Radioactives (Po, Ra, Rn)

Radium, polonium and radon may be names to make your hair stand on end, but are they actually useful for anything? And is our fear of them overbaked? Laurence Knight gets the chemistry rundown from Prof Andrea Sella of University College London at a hospital that used to treat cancer with radiation. Al Conklin of the Washington State Department of Health explains how we are still dealing with the world's early Twentieth Century craze for all things radioactive. Edwin Lane reports from Finland on how the country's geology and climate conspired to fill their houses with a radioactive gas. Plus, we hear from Prof Norman Dombey, a key expert witness in the public enquiry into the murder of Alexander Litvinenko.

(Picture: Glow-in-the-dark radium clock dial; Credit: Ted Kinsman/Science Photo Library)

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Nitrogen (N) - explosives

Nitrogen (N) - explosives

Some 78% of the Earth's atmosphere is nitrogen. Yet this seemingly inert gas is the key component of bombs and explosives. It has brought life and death on an epic scale since mankind first unlocked i...

26 Heinä 201435min

Carbon (C) - plastics

Carbon (C) - plastics

Polymers – or plastics – are enduring, cheap, mouldable and versatile. Yet their very durability mean they litter our landscapes. And their main raw material - crude oil - will not last forever. So co...

25 Heinä 201434min

Sodium (Na)

Sodium (Na)

What links soap, paper, heart disease and murder? Sodium. In the latest in our series of programmes looking at the world economy from the perspective of the elements of the periodic table, Justin Rowl...

24 Heinä 201432min

Chlorine (Cl)

Chlorine (Cl)

Chlorine is more than just a chemical used in swimming pools. This poisonous green gas is the great enabling element of the chemicals industry, used in creating your clothes, computer chips, medicines...

23 Heinä 201433min

Lithium (Li)

Lithium (Li)

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 Ju...

22 Heinä 201432min

Rare Earth Elements (Ce, Nd, Dy, Er, etc)

Rare Earth Elements (Ce, Nd, Dy, Er, etc)

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...

21 Heinä 201432min

Carbon (C) - diamonds

Carbon (C) - diamonds

Diamonds are not forever. They can be burned, and these days they can be mass-produced in a factory. So can your jeweller tell the difference between a natural and chemically identical "fake"? And can...

20 Heinä 201431min

Calcium (Ca)

Calcium (Ca)

Calcium is the great structural element. It is the basis of much of the great architecture in nature as well as many of the incredible structures made by man. Presenter Justin Rowlatt hears from chemi...

19 Heinä 201427min

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