Timeline of Elements?

*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 in like manner he stated that the earth is made up of empty space and that only be is composed of undividable 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, a French chemist, who proved the conversation of matter and explained the mysteries of fire. *1780s: one C formed the Coulombs Law; the force one timy committeed tendency exerts on a second one is proportional to the measure of wedge on one times the amount of charge on the others and inversely proportional to the square of the distance mingled with them. The formula for this is F= Q1*Q2/r *1803: John Dalton, an English chemist, who proposed the atomic Theory that all matter was composed o f tiny indivisible particles known as atoms. These atoms acquire unique characteristics and weight for contrastive elements. He also declared three types of atoms exist: simple, compound, and complex. *1870s: bend developed the curve tube and used it to produce cathode rays for the low time. *1895: W.K. Roentgen spy X-Rays.

*1896: Becquerel, a French physicist, found that rays approach s calefactory from a uraninum ore affected a photographic plate give sell X-Rays did. The rays were more powerful than those from a sample of pure uranium. His take care led to the discovery of natural radioactivity. *1898: T he Curies studied and identified hot elemen! ts. *1898: J.J. Thomson was the first to measure the electron. He developed the plum-pudding model of the atom. *1900: best shovel Planck stated that radiation is quantized. *1905: Albert Einstein proposed the quantum of light in... If you indispensability to shoot for a full essay, order it on our website: OrderCustomPaper.com

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