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400 BCE
Democritus
Democritus believed that atoms could not be created, destroyed, or further divided. -
350
Aristotle
Aristotle didn't agree with the atomic theory like Democritus. -
Antonie Lavoisier
Antonie created the law of conservation of mass. Which is stating that mass cannot be destroyed or created. -
Cotton Gin
Eli Whitney invented the cotton gin in 1793. The cotton gins purpose was to speed up the process of removing seeds from cotton.
http://www.history.com/topics/inventions/thomas-edison/videos/ask-history-who-really-invented-the-light-bulb -
Joseph Proust
Proust published the first law of definite proportions. Which states that a compound is composed of exact proportions of elements by mass regardless of how the compound was created. -
Amadeo Avagadro
Amadeo concluded that the equal volumes of all gases at the same temperature and pressure, contain equal numbers of molecules. He is the first scientist to realize that elements could exist as molecules rather than individual atoms. -
War of 1812
The war of 1812. The United States took on the greatest naval power in the world, Great Britain. One cause of the war was British attempts to restrict U.S trade. The war ended on February 7 1815 and the United States celebrated the war as a "second war of independence"
http://www.history.com/topics/us-presidents/james-madison/videos/james-madison-and-the-war-of-1812 -
John Dalton
Dalton revised Democritus ideas, and made 'Daltons Atomic theory". Which consisted of 3 main parts. -
First telephone
Alexander Graham bell invented the first telephone in 1867.
http://www.history.com/topics/inventions/alexander-graham-bell/videos/the-telegraph-and-telephone -
The first light bulb
Thomas Edison invented the first light bulb in 1878
http://www.history.com/shows/america-the-story-of-us/videos/thomas-edison -
William Crookes
Crookes suggested that the atom wasn't a solid sphere like Dalton said. Later Crookes invented a cathode ray which later led to the inventions of the computer and television. -
J.J Thomson
Thomson concluded that the mass of a charged particle was much less than the mass of a hydrogen atom. Which surprised J.J because it mean't that there were particles smaller than the atom. -
Henri Becquerel
Discovered some chemicals spontaneously decompose and give off very penetrating rays. Found radiation. -
Henry Moseley
Moseley discovered that atoms of each element contain a unique positive charge in their nuclei. To sum it all up, Moseley discovered and explained the atomic number. -
Max Planck
Max came to a conclusion, and it was called Quanta. A quantum is the minimum amount of energy that can be gained or lost by an atom. Max's conclusion was that matter can gain or lose energy only in small specific amounts. That is where he got Quanta. -
First airplane
The wright brothers, Wilbur and Orville invented the first airplane.
http://www.history.com/topics/inventions/wright-brothers/videos/ask-history-who-really-invented-the-airplane -
Albert Einstein
Albert Einstein was famous for the relativity, which laid the basis for the release of atomic energy. In 1905 he formulated a special theory of relativity. He calculated how the movement of molecules in a liquid can cause the brownian motion. -
Robert Millikan
Robert determined the charge of an electron. After many questions were asked, he proposed a model of the atom to become known as the plum pudding model. -
Ernest Rutherford
Ernest concluded that the plum pudding model was incorrect and set out to create one of his own. Ernest's new nuclear atomic model showed that most of an atom consists of electrons moving rapidly through empty space. In 1920 Rutherford had refined the concept of the nucleus, and concluded that the nucleus contained protons. -
Niels Bohr
Bohr proposed that the hydrogen atom has only certain allowable energy states.The lowest state is called ground state, and the highest is the called an excited state, (when an atom gains energy) -
Madam Curie
Radiation was not the outcome of some interaction of molecule but must come from the atom itself. This hypothesis was an important step in disproving the ancient assumption that atoms were indivisible. -
Werner Heisenberg
Werner concluded that it is impossible to make any measurement on an object without disturbing the object. In 1925, Werner formulated a type of quantum mechanics. He also came to another conclusion, The Heisenberg uncertainty principle which states that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time. -
Erwin Schrodinger
In 1926 Erwin furthered the wave particle theory by Louis. He made an equation that treated the hydrogen atom's electron as a wave. Erwin's new model for the hydrogen surprisingly seemed to apply equally well to atoms of other elements, an area in which Bohr's model failed. -
Microwave oven
The microwave oven was accidentally invented by Percy Spencer, in 1945 -
Cold war
The Cold War started at the end of world war two and lasted till the dissolution of the Soviet Union. The war started because of the struggle between two world superpowers, USA and the USSR. -
James Chadwick
James was Ernest's coworker. James showed that the nucleus also contained another subatomic particle, a neutral particle called the neutron. -
Louis deBroglie
Louis had an equation called de Broglie equation. Th equation predicts that all moving particles have various characteristics. -
Post it note
The first post it note was created by Spencer Sliver in 1968. This invention was an accident because at the time, he was actually trying to make extra strong glue. -
9-11
19 people associated with an Islamic group, hijacked 4 planes and flew them straight through the world trade center. There were so many dead and injured. The after math was tragic as well.
http://www.history.com/topics/9-11-attacks/videos/after-911-the-future-in-one-word -
Facebook
Mark Zuckerburg invented facebook in 2004
