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776 BCE
Olymipics
The first Olympics started in 776 BC and lasted till 393 AD, it took 1503 years for the Olympics to return -
400 BCE
Democritus
Came up with a formulation of an atomic Theory of the Universe. -
340 BCE
Aristotle
He didn't believe in atoms and he thought that earth material was not made out of atoms. -
Joseph Proust
Stated the Law of Definite Proportions -
Antonie Lavoisier
Came up with Law of Conservation -
John Dalton
Atomic Theory said that all matter is made of atoms and atoms are indivisible and indestructible. Also states that all atoms of a element are the same as mass and properties. -
Louisiana Purchase
was a land deal between the United States and France, in which the U.S. acquired approximately 827,000 square miles of land west of the Mississippi River for $15 million. -
Amadeo Avagadro
Made a hypothesis that equal volume from gases at the same temperature and pressure and it contains same amount of molecules -
Walter Hut
Walter Hut made the first Saftey Pin, which is used to hold things together -
Mason Jar
John Landis Mason crated the first mason jar and he named the jar after himself -
Game Board
Milton Bradley made the first game board and it was used to past time -
William Crookes
He discovered thallium and continued to work on that new element and he isolated it and studied it. In 1873 the discovered its atomic weight. He discovered the principle of Crookes radiometer that converts light radiation in rotary motion, this is used later as a measuring tool. -
Telephone
Alexander Grahm Bell made the first telephone -
Albert Einstein
Discovered radioactivity which later contributed with the atomic theory. -
Henri Becquerel
Discovered radioactivity which was contributed to the atomic theory. -
J.J Thomson
He discovered the electron by experimentsing with things -
Madame Curie
Discovered radium and polonium in elements -
Ernest Rutherford
He found out that J.J Thomson's model of the atom was not right and he started to make on of this one and came to a conclusion that the atom consisted of small dense positively charged nucleus in the center of the atom with negatively charged electrons surrounding it. -
Henry Moseley
Discovered the atomic battery -
Niels Bohr
Made a model that showed the atom small and positivly charged nucleus that is surrounded by orbiting electrons -
World War 1
started in Sarajevo, Bosnia, where Archduke Franz Ferdinand, was shot to death along with his wife by the Serbian nationalist Gavrilo Princip on June 28, 1914 -
Max Planck
He is the origination of the Quantum Theory of energy, this helped understand the atom and subatomic process. -
Louis de Broglie
He did research over the quantum theory and predicted the wave nature of electrons. -
Robert Milikan
Had an oil drop experiment that helped quanitfy the charge of an electron, which has contributed greatly to our understanding of the atom -
Werner Heisenberg
He is associated with the quantum theory, which is the discovery of allotropic forms of hydrogen. -
Erwin Schrodinger
Developed a Electron Cloud Model, which consisted of a dense nucleus surrounded by a cloud of electrons at different levels of orbitals. -
James Chadwick
He discovered the neutron -
Manhattan Project
research and development project that produced the first nuclear weapons during World War II. -
Vietnam War
North Vietnam and its southern allies, against South Vietnam and its principal ally, the United States. -
John F. Kennedy
HE was killed
