-
300
Aristotle 300 B.C.
Said that everything was made up of earth, wind, fire, and water. -
400
400 B.C. Democritus
Democritus claimed that everything is made up of atoms. -
476
Roman Empire
This year was the end of the Roman Empire. -
Dec 25, 1130
Roger II
Roger II was crowned king of Silcily. -
Jan 1, 1503
Leonardo da Vinci
Leonardo da Vinci starts to paint the Mona Lisa. -
Battle of Sekigahara
Battle of Sekigahara was on this date. -
-
Joseph Proust
Established the law of definite proportions -
John Dalton
Proposed the Law of Simple Multiple Proportions -
Amadeo Avagadro
Said; equal volumes of all gases, at the same temperature and pressure, have the same number of molecules -
The Civil War
The American Civil war had just started. -
J.J. Thomson
Discovered electron. -
Max Planck
Developed the Quantum Theory. -
-
Henri Becquerel
Discovered radioactivity -
-
Madame Curie
Discovered radium -
Ernest Rutherford
Found out charge was in the nucleus -
Chevrolet
Chevrolet was founded by Louis Chevrolet and William C. Durant. -
Henry Moseley
Discovered a systematic mathematical relationship between the wavelengths of the X-rays -
Niels Bohr
Proposed that energy levels of electrons are discrete and that the electrons revolve in stable orbits around the atomic nucleus but can jump from one energy level to another. -
-
Werner Heisenberg
Developed the uncertainty principle -
Louis DeBroglie
Discovered the wave nature of electrons. -
James Chadwick
Discovered the neutron. -
Erwin Schrodinger
Formed the Schrodinger equation -
World War 2
World War 2 had just begun. -
World War 2
World War 2 had ended. -
The Civil war
The American Civil war was declared over. -
Al Brandt
I finally turned in this Project.
