Elixir est désormais compatible avec l'extension FastNews.kiwi disponible pour votre navigateur. Avec cette extension, vérifiez s'il y a des nouveaux sujets sur ce forum en un clic depuis n'importe quelle page !Cliquez ici pour en savoir plus.
10cf746e54 So crucial in fact that a new search is already under way - to find a fresh and reliable source of the elusive metal substance, before current sources dry up."It is an element beloved of chemists," explains chemist Andrea Sella of University College London, "because almost none of us has seen it".The tale of its discovery is something of a shaggy dog story, beginning with the father of the periodic table, the 19th Century Russian polymath Dmitri Mendeleev."He was the man who first came up with this systematic scheme for the elements," explains Sella. But they became an inspiration, because they stood up and fought."Subscribe to the BBC News Magazine's email newsletter to get articles sent to your inbox. 2 June 2016 Abandon 'utopian dreams', says EU head 2 June 2016 Golf tournament move angers Trump 2 June 2016 Features & Analysis No victory march Setbacks for Iraqi push to retake Falluja from IS Somaliland v the Sami The World Cup tournament for the stateless Joyful but jittery Paul Simon on happiness, death and Donald Trump Guns and sticks Inside a Hindu 'self defence' training camp Friend or foe Will Russia and Turkey overcome their differences? New thread Reddit boss hints at new online direction Chocolate dreams The shops championing Ivory Coast's cocoa at home Standing up for hate Why some on the internet loudly oppose a curb on 'hate speech' New 'Avengers' Who are the latest militants hitting Nigeria's oil pipelines? News navigation Sections Home Video World World Home Africa Asia Australia Europe Latin America Middle East US & Canada UK UK Home England N. Listen to the latest from Business Daily Browse the Business Daily podcast archive Read other stories in the series The mineral consisted of lead oxide and lead chromate, and the colour it produced became known to artists as "chrome red".In fact it provided a range of colours. Take a bit of steel, place it in a bath of acid containing dissolved chromium, and then pass an electric current through it, and the chromium will naturally stick to the surface of the metal as it discharges electricity.This was how another great icon was born - the engine of the Harley Davidson motorcycle.What Marlon Brando did for chromium In the 1953 film, The Wild One, Marlon Brando rode a Triumph, rather than a Harley, but it too glistened with stainless steel. "Because these people still died - many have died since the case. And the m refers to a specific configuration of those particles.The result is an atom that decays within a few hours, generating gamma rays - radiation that can be used to produce medical images.