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340
Aristotle - 5 Elements of Matter
In 340 BC, Aristotle discovered the 5 elements of matter, and this relates to the structure of the atom because atoms make up all matter. -
Period: 340 to
Atomic Theories
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465
Democritus - The Atom
In 465 BC, Democritus discovered that all matter is made up of atoms, atoms are indestructible, atoms are solid and homogenous, and atoms differ in shape, size, mass, position and arrangement. This relates to the structure of the atom because it is the invention of the atom. https://the-history-of-the-atom.wikispaces.com/Democritus
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Signing of Delceration of Independence
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Joseph Proust - Proust's Law
In 1794, Joseph Proust discovered Proust's law, which sis also known as the law of definite proportions. This relates to the structure of the atom because it helps us tell the difference between compounds. http://en.wikipedia.org/wiki/Joseph_Proust -
John Dalton - Dalton's Law of Partical Pressures
John Dalton discovered the concept of Dalton's Law of Partical Pressures and he was also the first scientist to explain the behavior of atoms in terms of measurement and weight. -
Civil War
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First Computer
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First television
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Invention of the lightbulb
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Invention of car
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Invention of the radio
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Henri Becquerel - Deomposing Chemicals
While studying the effect of x-rays on photographic film, Henri Becquerel discovered that some checmials decompose and give off harmful rays. This relates to the structure of the atom because it tells us which elements are radioactive and dangerous. http://www.chemistryexplained.com/Ar-Bo/Becquerel-Antoine-Henri.html -
J.J Thomson - The Electron
In 1897, J.J Thomson discovered the electron, which relates to the structure of an atom, because without it, we wouldn't know why atoms have a negative charge. https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&docid=aNRlA0bGwB2KDM&tbnid=IvrE6Pu5nOSATM:&ved=0CAcQjRw&url=http://fronteira.net.br/wp-content/themes/monochrome/jj-thomson-atomic-model-plum-pudding&ei=cNkoVMt0hKDJBPqugaAN&psig=AFQjCNFaVUjVXm1PTjqEY47ba4kv_kJBKQ&ust=1412049642512113 http://www.chemherit -
Paper Clip Invented
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Ernest Rutherford
In 1911, Ernest Rutherford discovered the nucleus of the atom. This relates to the structure of the atom because the nucleus is a big part of the atom. http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/atomic-and-nuclear-structure/hoffman.aspx
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Niels Bohr - Bohr Model
In 1913, Niels Bohr created the Bohr atomic model, which states that electrons orbit around the nucleus of an atom. This relates to the structure of an atom because it shows how electrons are connected to atoms. http://upload.wikimedia.org/wikipedia/commons/thumb/5/55/Bohr-atom-PAR.svg/2000px-Bohr-atom-PAR.svg.png -
Robert Millikan - The Charge of an Electron
Robert Millikan discovered the charge of an electron which relates to the structure of an atom because he concluded that the mass of an electron is at least 1000 times smaller than the mass of an electron, so it helps us measure the mass of an atom. http://chemed.chem.purdue.edu/genchem/history/millikan.html -
World War 1
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Albert Einstein - Theory of Relativity
Albert Einsteins discovery of the theory of relativity relates to the structure of the atom because it's the basis of nuclear energy and how the atoms can transfer energy. http://einstein.biz/biography.php -
Werner Heisenberg - Quantum Mechanic Model
In 1925, Werner Heisenberg created the Quantum Mechanic Model which relates to the structure of the atom because he calculated the behavior and movement of electrons. https://the-history-of-the-atom.wikispaces.com/Werner+Heisenberg
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Louis de Broglie - Wave Mechanics Theory
Louis de Brogile founded the wave mehcaincs theory which states that electrons can act like particles and waves, like light does. This relates to the structure of the atom because it helped explain why electrons do some of the things that we didn't know why they did them before. https://the-history-of-the-atom.wikispaces.com/Louis+de+Broglie -
Erwin Schrodinger - Quantum Numbers
In 1926, Erwin Schrodinger invented quantum numbers. This relates to the structure of the atom because it is a mathematical model of the distribution of the electrons in an atom. http://chemed.chem.purdue.edu/genchem/history/schrodinger.html -
James Chadwick - The Neutron
In 1932, James Chadwick discovered the neutron, which relates to the structure on an atom because nuetrons are present in all atomic nuclei except hydrogen, which helps separate the difference between hydrogen and all other elemets.
http://www.famousscientists.org/james-chadwick/ -
World War 2
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Max Planck - Planck's constant
Planck's constant describes teh relationship between energy and and the frequency of radiation. This relates to the structure of the atom because it shows us how energy transfers from one atom to the other. http://www.nobelprize.org/nobel_prizes/physics/laureates/1918/planck-bio.html
