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Jan 1, 1000
Democritus
The first person to propose the idea that matter was not infinitely divisible. -
Jan 1, 1000
Aristotle
No smallest part of matter and different substances had different proporations of Fire water earth and rain. -
Antonie Lavosier
Chemical elements can't be destory or created just combined. -
Whiskey Rebellion
It was a tax protest in the United States. -
Joseph Proust
created the law of constant composition -
John Dalton
Stated that all matter is made of atoms, atomes of a given element a unique weight and characteristic, and three kinds of atoms complex, compound, and simple. -
Amadeo Avagadro
Temperature and pressure equals volume of gases containing the same number of atoms. -
Iowa
Became part of the union. -
William Crooks
vestigated flows of particules through gases -
Henri Becquerel
Chmicals spontaneously decompose and give off pentrating rays. -
Madame Curie
Discovered two new elements that helped discoveries on radiation. -
J. J. Tomson
Suggested that atoms were built on more a fundamental unit. -
Max Planck
quantum nature of energy -
Albert Einstein
E=mc^2 -
Ernest Rutherford
Describing the atom as having a central positive nucleus surrounded by negative orbiting electrons. -
Robert Millikan
Made electrons have an electrical charge -
Titanic Sink
The Titanic sunk when it an ice berg on it's way from England to New York. -
Henry Moseley
Atoms contains in its necleus a number of positive nuclear charges that equals to atomic number on the periodic table. -
Niels Boher
Electrons travel in discrete orbits around the atom's nucleus. -
Erwin Schrodinger
describe the behavior of electrions -
Louis de Broglie
Electrons move as a wave in some conditions -
The Great Depression
Was the decade that preceded World War I and it was an economic depression. -
Werner Heisenberg
The position and engery of a particle are only a certain amount. -
James Chadwick
Found neutrons -
Pearl Harbor
An attack on the United States by Japan which brought the U.S. into WWII. -
D-day
Allied invasion during World War II. -
John F. K. assassination
Was shot down in a parade that he was going with his wife. -
Landing on the moon
Neil Armstrong was the first person to set foot on the moo. -
Oklahoma Bombing
It was the most destructive terroism on american soil until 9-11 by taking 168 live and of that was 19 killed under the age of 6. -
9-11
A plane was flown into the world trade center.
