-
Known metals were recorded and listed in conjunction with heavenly bodies
-
Democritus proclaimes the atom to be the simplest unit if matter was composed of atoms
-
Aristotle declates the existence of only for elements; fire, air, water, and earth. All matter is made up of these four elements and had four properties hot, cold, dry, and wet.
-
Influenced greatly by Aristotle's ideas, alchemists attempted to transmute cheap metals to gold. The substances used for this conversion was called the philosopher
-
Although Pope John XXII issues an edict against gold making, the gold business continued despite the alchemists effort, transmutation of cheap metals to gold never happened.
-
This disprover of Aristotle's four elements theory and the publishing of the book. The skeptical chemist (By Robert Boyle) combined to destroy this early form of chemistry.
-
Johnann H. Beecher believed in a substance called phlogiston. When a substance is burned, phlogiston was supposedly added from the air to the flame of the burning object.
-
Charles Coulomb discovered that given two particles separated by a certain distance, the force of attraction or repulsion is directly proportional to the produce of the two charged and is inversely proportional to the distance between the two charges.
-
Joseph priestly heated call of mercury, collected the colorless gas. Priestley called the gas "dephlogistival air" but it was actually oxygen. Atoine Lavasirr who disproved the theory renamed it oxygen.
-
John Dalton publishes his atomic theory which states that all matter is composted of atoms, which are small and invisible.
-
Henrich Geissler creates the first vacuum tube.
-
William Crooks made headway in atomic theory when he used a vacuum tube to discover cathode rays. Crooked created a glass vacuum tube which had zinc sulfide coating in the inside of one end, a metal cathode imbedded the other end and a metal anode in the shape of a cross in the middle of the tube. When electricity ran through the apparatus, an image of the cross appeared.
-
Eugene Goldstein discovered positive particles by using a tube. The positive particle had a charge equal and opposite of the 1.66E-24grams or one atomic mass unit.
-
Wilhelm Roentgen accidentally discovered x-rays while researching the glow produced by cathrode rays. He performed his research on cathrode rays,m, within a dark room and during research. Noticing a bottle of barium platinocyanide was glowing on the shelf.
