Timeline of Elements?
Date Submitted: 01/13/2003 10:48:49
Category: / Science & Technology / Chemistry
Length: 2 pages (524 words)
Category: / Science & Technology / Chemistry
Length: 2 pages (524 words)
*500 BC- 1720: Alchemists used Ancient Art, during the middle Ages, to discover a substance that would change common metals to gold or silver.
*442 BC: Democritus came up with the theory of atoms, and also he stated that the universe is made up of empty space and that all matter is composed of indivisible atoms.
*384 - 322 BC: Aristotle developed techniques for gathering scientific facts. His progress provided the basis for scientific work more than a millennium.
*1777: Lavoisier, …
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…Uranium is bombarded by neutrons it produces smaller nuclei roughly half the size of the original Uranium nucleus.
*1938- Lise Meitner realized that Hahn was splitting the Uranium nucleus, something never done before.
*1951- Glen Seaborg succeeded in making man-made elements first.
*1964- Murray Gell-Mann and George Zweig recommended the idea of quarks called up, down, or strange, unruffled of mesons and baryons, with spin 0.5 and electric charges of 2/3, -1/3, and -1/3 in that order.
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