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323
Aristotle - Education
Aristotle tutored Alexander the Great and taught him new things that helped him with his education. He also built a school for other children to be educated as well a few months after he stopped tutoring Alexander. -
384
Aristotle - day of Birth
Born in Greece, aristotle in the year 384bc. -
400
Domicritus 400bc - 500bc
Domicritus made an achievement later in his life, proposing the idea of the atom. -
400
Aristotle Major Contribution
Aristotle stated that all of the substances int the world are made of 4 elements, which are earth, air, water, and fire. -
461
Domicritus - Day of Birth
Born on 460bc in the town Abdera, Thrace. -
Jhon Dalton - Major Contribution
Transforemed the ideas of atoms by Domicritus into a scientific theory. His Atomic Theory is that all matter is made of tiny indivisible particles called atoms, the atoms of the same elements are alike those of different elements are different, atoms of different elements combine in small, whole ratios to form atoms, and that chemical reactions involve the changes of atoms. No new atoms are alike (Law od constant composition). -
J. J. Thompson - The Plum Pudding Model
He displayed the Plum Pudding Model showing the atomic nucleas in a sphere of clear material -
J. J. Thompson - Cathode Ray Tube Experiement
J. J. Thompson conducted the Cathode Ray Tube Experiment. By adding an atom tol the experiment he found out that the moving pieces had a negative charge on them. -
J. J. Thompson - Major contribution
J. J. Thompson discovered the electron and also conducted the Cathode Ray Tube Experiment. -
Robert Millikan - Major Contribution
Robert Millikan determined the Couloumbs an SI unit of the Electron. He also conducted the Oildrop Experiment be measuring the effect of an electric field on very tiny oil droplets. -
Ernest Rutherford - His Discovery
Discovered the proton by aiming beams of posotive particles at a piece of gold sheet. The charge particles passed through the foil, but a few of them reflected off in large angles. He concluded that the atom is made up of mostly central charg, and tha the atom contains a posotive piece at center. -
Neils Bohr - Major Contribution
He proposed that an atom is found only in specific circular paths, or electron around the nucleas. Its reffered to as nitrogen atom because electrons move around the nucleas leke planets around the sun. -
Sir James Chadwick - Major Contribution
Confirmed the existence of neutrons in the 1900s (1932).
