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Jan 1, 1000
Democritus
460 BC He developed the idea of atoms -
Jan 1, 1000
Aristotle
460 BC He thought Democritus's idea was worthless -
Boston Massacre
This is the date that the Boston Massacre took place. 5 people ended up dieing. -
Signing of Declaration of Independence
This is when the US broke free from the control from the British -
Antonie Lavosier
Discovered that the Phlogiston Theory was incorrect -
Joseph Proust
Formulated Law of Definite Proportions -
John Dalton
John performed experiments with various chemicals that showed that matter seemed to consist of elementary lumpy particles -
Amadeo Avagadro
He published an article with the title Essai D'une maiere de determiner les masses relatives des molecles delementaires des corps, et les proportions selon lesquelles elles entrent dans ces combinaisons. -
Iowa becomes a state
On this date Iowa becomes the 29th state. -
William Crooks
Discovered the Cathode Ray, which led to the making of the TV. He also found electrons. -
End of Slavery
This is when all the slaves became free. -
Abraham Lincoln Dies
This was the date that Abraham Lincoln was killed. He was shot by John Wilkes Booth. -
Henri Becquerel
He discovered radioactivity -
J.J. Thomson
Discovered the electron and proposed a model for the structure of the atom. -
Max Planck
A professor of theorectical physics in berlin showed that when you viberate atoms strong enough, such as when you heat objects until it glows, you can measure the energy only in discrete units. He called these energy packets, quanta. -
Albert Einstein
Wroter a ground-breaking paper that expained that light absorption can release electrons from atoms, a phenomenon called "Photoelectric Effect". -
Robert Millikan
Determined the charge of an electon -
Ernest Rutherford
Thought it would be interestion to bombard atoms with these alpha rays, figuring that this experiment could investigate the inside of the atom (sort of like a probe) -
Madame Curie
Whe was awarded the Nobel Peace Prize for the discovery of the elements, Radium and Polonium -
Niels Bohr
Came up with theory that said the electrons do not spiral iinto the nucleus and came up with some rules for what does happen -
Titanic Sunk
The Titanic Sunk -
Henry Moseley
Discovered that atoms of each element contain a unique positive charge in their Nuclei. -
First NFL game
The first NFL game was played by the Columbus Panhandles and the Dayton Triangles. Dayton won 14-0 -
Louis Debroglie
He came up with the idea that atom particles behave like waves -
Werner Heisenberg
Came up with the theory called Matric Mechanics which explained the behavior of atoms, based off of the theory of waves -
Erwin Schrodinger
Had a theory with particle waves and formed a model of the atom on that basis -
TV Invented
This was the year the first working TV system was created. It was created by Philo Farnsworth -
James Chadwick
Finally discovered the neutron -
Elvis Dies
This was the date that Elvis Presley died. -
Berlin wall fell
This is when the Berlin wall fell down
