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Jan 1, 1000
Democritus
Around 440 BCE Theory of Perception: thin layers of atoms sloughed off and released air borne into the eye and that’s why we see -
Jan 2, 1000
Aristotle
Principle of scientific epistemology which is the role of senses, abstraction, laws of logic, types of reasoning, and rules for deductive reasoning 384-322 BC -
Aug 5, 1100
Henry I King
Henry I is crowned King of England in Westminster Abbey. -
Jan 1, 1492
Columbus
Discovery of America -
Spanish Armada
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Antonie Lavosier
Found and termed oxygen -
Antonie Lavosier
found and termed hydrogen -
Joseph Proust
Proved wrong Berthollet's theory with law of definite proportions theory -
John Dalton
Verbally expressed relative atomic weights, supporting his theory; all elements made of atoms, atoms of the same element are the same in sixe shape and properties, atoms can not be subdivided, created, or destroyed, toms of different elements combine in whole number ratios, and in chemical reactions, atoms are combined, rearranged, and seperated. -
Amadeo Avogadro
Corrected Dalton's flaw in his theory.
Mole Concept. Avogadro's number: 6.02 x 10^23 -
Iowa Becomes a State
Iowa admitted 29th state -
Lincoln Assination
Good Friday President Lincoln was assinated. Shot in the back of the head by John Wilkes Booth -
William Crookes
dentified first sample of helium -
Henri Becquerel
investigate phosphorescence in uranium salts -
J.J. Thomson
credited with discovery of electron -
Max Planck
Modern Quantum Thoery: EM Radiation also has particle nature exhibiting wave particle duality Planck’s Constant: 6.63x10^ -34 kgm^2/sec -
Madame Curie
Nobel Peace Prize in Physics
Discovered Radioactivity -
Albert Einstein
Special theory of relativity, All matter is equivalent to a discrete amount of energy
E=mc^2 -
Robert Millikan
Oil Drop Experiment: tested to see size of electric charge on a single electron -
Ernest Rutherford
Model of atom -
Ernest Rutherford
Gold Foil Experiment -
Madame Curie
Nobel Peace Prize Chemistry -
Niels Bohr
Planetary model of atom. Electrons orbit in definite energy levels which at a quantized fixed distance from nucleus. -
Henry Moseley
Re-arranged periodic table based on ohysics of elements -
Louis deBrogile
proposed without evidence that all particles of matter should have wave properties and thus exhibit wave-particle duality -
Werner Heisenberg
Uncertainty Principle
Particles are also waves which means they have no point location and are spread out over a region -
erwin schrodinger
Wave mechanical model of atom
Equation to describe wave nature
Schrodinger Wave Equation -
James Chadwick
Nobel Peace Prize in Physics -
World War II
U.S. declares war
against Japan -
ISU: the first electronic digital computer
Invented by mathematics and physics professor John Atanasoff and engineering graduate student Clifford Berry during 1937-42, the Atanasoff-Berry Computer, or ABC, pioneered important elements of modern computing, including binary arithmetic, regenerative memory, parallel processing, electronic switching elements, and separation of memory and computer functions.[30] -
First Appearanace of Spider-Man
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FIrst Man on Moon
Commander Neil Armstrong became the first man on the moon. He said the historic words, "That's one small step for a man, one giant leap for mankind." -
Fall of the Twin Towers
