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Table: The idea of classifying chemical substances: According to the Aristotelian un- derstanding, gold was the purest of all metals. However, this metal could be degraded, and thus be transformed in less [...] n which alchemist tried to carry out in order to refine metals so that in the end they would have gold again.). It has to be understood that alchemy has to be taken as being the funda- mental basis of [...] materials, thus in the end by recombining elementary principles to arrive at new materials and possibly gold. Thus a development towards the Periodic Table can only be identified when this under- standing of

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• Mendeleev and the Periodic System

potato was edible, digestible and filling. The European explorers, however, were more interested in gold and silver. That’s why the potato only came to Europe about four hundred years ago, one hundred years

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• Potato Diversity

accessible digital form ("open access"), either directly via peer reviewed open access journals ("gold model") or simultaneously resp. delayed via open access portals or institutional repositories ("green

Streben nach Reichtum übermächtig wird, z.B. mit dem irren Projekt, Stroh zu Gold spinnen zu wollen: „(A)ls (der König) das Gold erblick- te, erstaunte er und freute sich, aber sein Herz ward nur noch go

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• Prof. Dr. Werner Reinhart

explain yourself!” Geiger continued, “We have used a radium source to project alpha particles at a gold foil mounted on a thin, glass plate and find that about one in twenty-thousand of the alpha particles

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• Rutherford’s Nuclear Atom

disadvantage. It was made of silver and oxi- dized and had to be often clean. Muochot was awarded a gold medal for presentation of this ex- periment. Furthermore, in 1880, Mouchot’s assistant Abel Pifre

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• Mouchot and the solar cooker

Rutherford accepted the offer, and began working there in 1907. In the Manchester laboratory, the famous gold foil experiment was conducted by Hans Geiger and undergraduate student Ernest Marsden in 1909, under [...] scattering of alpha particles, which came from radioactive radon-222 and were directed at a piece of gold foil. The scatter- ing of the alpha particle should have only been de- flected by one or two degrees [...] even though not entirely unexpected. In the course of the experimentation, Geiger and Marsden used gold foil, as this could be made extremely thin. They ob- served that even though the vast majority of

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• Maria Skłodowska-Curie: discoverer of two radioactive elements

Rutherford accepted the offer, and began working there in 1907. In the Manchester laboratory, the famous gold foil ex- periment was conducted by Hans Geiger and un- dergraduate student Ernest Marsden in 1909 [...] scattering of alpha particles, which came from radioactive ra- don-222 and were directed at a piece of gold foil. The scattering of the alpha particle should have only been deflected by one or two degrees. [...] explain yourself!” Geiger continued, “We have used a radium source to project alpha particles at a gold foil mounted on a thin, glass plate and find that about one in twenty-thousand of the alpha particles

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• Rutherford’s Nuclear Atom

to be seen again. That summer, I'd just become friends with two girls from school named Natalie Golding and Lauren Shipley. I already knew that our friendship wasn't going to last, but I felt lucky to [...] then walked outside with Natalie and 8 / EM MA BINDER Lauren close behind me. Natalie's mom, Mrs. Golding, was in the yard in a visor and sunglasses, hosing the hedges. "You girls ride safe," she said, waving [...] coded and secretive, characterized by a barrier I couldn't pass. I pedaled faster, replaying Mrs. Golding's words: You girls, you girls, you girls. I always winced when I heard those words, as if bitten

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• BA-2 Oral Exams Spring 2026

phenomenon—producing ice from heat! The jury of the Fair was so impressed that it awarded Augustin the gold medal in his category, and the Ministry of Agriculture and Trade, not to be outdone, named him Knight

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• Mouchot and the solar cooker