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He was first to believe matter was made up of tiny individual particles called atomos(490 B.C.)
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Rejected the atomic theory entirely because it did not agree with his own ideas on nature(390 B.C.)
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Compiled a list of 23 elements(1790)
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Found the law of constant composition(1799)
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Revived Democritus ideas based upon the results of scientific research he conducted(1800)
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Determined the volume of one mole of gas(1811)
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Discovered that phosphorescent uranium salts even when not exposed to light produced spontaneous emissions(1862)
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Discovered the cathode ray(1875)
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He had identified the first subatomic particle called the electron(1897)
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Discovered Polonium(1898)
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In 1898 and lasted a little over 3 months and was located in Cuba, Puerto Rico, Philippines, and Guam
https://www.youtube.com/watch?v=q1goSNElCyE -
Lasted from 1899 to 1902 and was located in the Philippines
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Matter can gain or lose energy only in small amounts called quanta(1900)
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Invented in 1902 by Conrad Hubert
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Wright brothers flew the first plane in 1903
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Edward Binney and Harold Smith invented them by combining paraffin wax and color pigments and created Crayola Crayons in 1903
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Determined the charge of an electron(1905)
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Calculated that a photon’s energy depends on its frequency(1905)
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He found the nucleus(1911)
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Each nucleus has a positive charge(1912)
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The hydrogen atom atom has only certain allowable energy states(1913)
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Invented in 1916 by John Lloyd Wright
https://www.youtube.com/watch?v=a4V9dgV-Jic -
Earle Dickson invented the first easy band-aid in 1920
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Richard G. Drew created masking tape for painters in 1923
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Derived an equations that treated the hydrogen atom’s electron as a wave(1926)
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Saw that only whole numbers of wavelengths are allowed in a circular orbit or fixed radius(1926)
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First automatic bread slicer invented by Otto Frederick Rohwedder in 1927
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Invented in 1927 by Edwin Perkins and changed the name from “Fruit Smack” to “Kool-Aid” and sold it in powdered packets
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Concluded that it is impossible to make any measurement on an object disturbing the object(1930)
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Found that the nucleus also has a neutral particle called the neutron(1932)
