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First person to propose that matter is made up of tiny particles
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believed that all substances were made of Fire, Water, Air, and Earth
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The American Revolution started as a response to the Stamp Act of 1765. http://www.history.com/topics/american-revolution/american-revolution-history/videos
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Benjamin Franklin, John Adams, Thomas Jefferson, Roger Sherman and Robert Livingston drafted the Declaration of Independence.
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found that mass is conserved in a chemical reaction and the number of hydrogen and oxygen atoms before and after the reaction remains the same.
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published his Law of Definite Proportions
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Created the theory of the atom stating that all matter is made of atoms and atoms are indivisible and indestructible.All atoms of a given element are identical in mass and properties. Compounds are formed by a combination of two or more different kinds of atoms. And a chemical reaction is a rearrangement of atoms.
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hypothesised that equal volumes of different gases contain an equal number of molecules, given that they are at the same temperature and pressure
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The Battle of the Alamo was a battle for an area of Texas http://www.history.com/topics/alamo/videos
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The Civil War broke out for several reasons. one of the most important issues was slavery.
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Abraham Lincoln was assassinated at Ford’s Theatre by John Wilkes Booth. http://www.history.com/topics/us-presidents/abraham-lincoln/videos/the-other-side-of-lincoln-lincolns-assassination
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discovered polonium and radium and X-rays
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Discovered the element thallium and the electron
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discovered radioactivity
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produced a series of experiments designed to study the nature of electric discharge in a high-vacuum
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came up with the law of conservation of mass and energy
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proved that radioactivity involved the nuclear transmutation of one chemical element to another and discovered the concept of radioactive half life
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proved that every element’s identity is uniquely determined by the number of protons it has
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Bohr developed a model of the atom which electrons revolve around the nucleus but can jump from energy level to energy level
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the originator of the quantum theory
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women were granted the right to vote with the addition of the Nineteenth Amendment to the Constitution
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took a measurement of the elementary electronic charge
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developed a theory on electron waves, predicted the wave nature of electrons.
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added to the atomic theory by including quantum mechanics based on quantum theory for interpretating behavior of elementary particles
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Discovered the neutron
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created the quantum mechanical model of the atom, an addon to Bohr's modle which uses an equasion to determine the position of electron
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D-Day occurred, this was a major victory for Allied troops in World War II http://www.history.com/topics/world-war-ii/d-day/videos/dday-invasion
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Korean War started, It was a war between the Democratic People’s Republic of Korea and the Republic of Korea. https://www.youtube.com/watch?v=t44SbOyjEUM
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The Vietnam War started, the conflict was between North Vietnam and South Vietnam https://www.youtube.com/watch?v=89_3DgW_7mg
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Apollo 11 was the first manned spacecraft to land on the moon. Buzz Aldrin and Neil Armstrong took the first steps on the moon
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