-
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.
-
Born in Greece, aristotle in the year 384bc.
-
Domicritus made an achievement later in his life, proposing the idea of the atom.
-
Aristotle stated that all of the substances int the world are made of 4 elements, which are earth, air, water, and fire.
-
Born on 460bc in the town Abdera, Thrace.
-
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).
-
He displayed the Plum Pudding Model showing the atomic nucleas in a sphere of clear material
-
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 discovered the electron and also conducted the Cathode Ray Tube Experiment.
-
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.
-
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.
-
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.
-
Confirmed the existence of neutrons in the 1900s (1932).
