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2016 BCE
Democritus
Atomic Theory- was not accepted by Aristotle. -
2016 BCE
Aristotle
He came up with the elements. He knew there was more than one. He did not believe in the atomic theory at first -
U.S. Declares Independence
The United States of America declared its independence from Great Britain. They adopt the Declaration of Independence -
Antonie Lavosier
Law of Conservation of mass. - No matter is lost int he event of combustion -
Joseph Proust
Law of definate proportions- regardless of amoutn, a compund is always composed of the same elements in the same proportions by mass -
John Dalton
4 Parts to his theory 1) Everything is made of matter, Atoms are indestructable and indivisable. 2) Atoms that make up the same element are the same in mass and properties. 3) Compounds are formed by two or more elements combined. 4) "A chemical reaction is a rearrangement of atoms" -
Amadeo Avagadro
Equal volumes of different gases contain an equal number of molecules- Avogadro's Law -
War of 1812
War between the U.S. and Great Britain, because of Great Britian Restricting the U.S. Trade, and America's desire to expand the U.S. Territory. http://www.history.com/topics/us-presidents/james-madison/videos/james-madison-and-the-war-of-1812 -
First Computer
The first mechanical computer was created by charles Babbage -
William Crookes
He conducted research on the cathode ray, static electricity. He also discovered the element thallium. -
Abraham Lincoln Assassination
Abraham Lincoln was assassinated in Fords Thetre by John Wilkes Booth http://www.history.com/topics/us-presidents/abraham-lincoln/videos/the-other-side-of-lincoln-lincolns-assassination -
J.J. Thomson
Determined the charge-to-mass ratio of the charged particle. He concluded that the mass of the charged particle was much less than a hydrogen atom. Which was the lightest at that time. Which he then discovered the electron, which is smaller than the atom -
Henri Becquerel
Found Radiation after being inspired by X-rays. -
Max Planck
Quantom Theory -
Madame Curie
She deduced that the radioactivity does not depend on how atoms are arranged into molecules, but rather that it originates within the atoms themselves. -
Albert Einstein
Theory of Relativity- The laws of physics are the same for all non-accelerating observers, adn that the speed of light in a cacuum was the independent of the motion of all observers. -
Robert Millikan
Determined the charge of the electron. It is currently within 1% of the accepted value today. Plum pudding model of the atom. -
Ernest Rutherford
Determined that electrons floated around inside an atom, which was made up of mostly empty space. Found the nucleus, a tiny dense region in the center of the atom. -- Nucleus contained positivley charged particles called protons. -
Niels Bohr
Energy is transferred only in certain well defined quantities. Electrons move around the necleus in a specific route. -
Louis deBroglie
Predicted the wave nature of electrons -
Werner Heisenberg
Uncertianty Principle -
First Successful television
The first successful demonstration of a television. -
James Chadwick
Found that the nucleus contained a neutral particle- called a neuton. Neutrons has a mass equal to a proton, but carries no charge. -
Erwin Schrodinger
Wave theory of matter, and the Schrodinger's cat -
Henry Moseley
Founds the atomic number, which defines the number of protons in an atom. -
Assassination of John F. Kennedy
John F. Kennedy was assinated by Lee Harvey Oswald, while on a motorcade in Dallas TX. http://www.history.com/this-day-in-history/11/22 -
O.J. Simpson Acquitted
O.J. Simpson was acquitted of the murder if his wife and her friend after a 252 day trial -
9/11 Terroist Attacks
Terroists highjacked airlines and crashed them into the twin towers, the pentagon, and the world trade center. https://www.youtube.com/watch?v=PMkZXqS9Iro
