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Antoine Lavoisier
He made the Law of Conversion. He began the conversion of what an atom was exactly. ttp://historyoftheatomictheory.weebly.com/antoine-lavoisier.html -
Joseph Louis Proust
He is known for the Law of Definite Proportions. Proust's law influenced the Law of Conversion of Mass, which influenced the Atomic Theory.
https://prezi.com/lcljnscgdunf/joseph-proust-contribution-to-the-atomic-model/ -
Invisible Solid sphere model
Orininally discovered by Democritus, later proposed by John Dalton. -
John Dalton
He made an atomic theory that stated that elements consisted of tiny particles called atoms that can not be seperated or destroyed. It states that an element is pure becaause the atoms of an element are identical.https://the-history-of-the-atom.wikispaces.com/John+Dalton -
Michael Faraday
Studied the effect of electricity on solutions, coined term "electrolysis" as a splitting of molecules with electricity, developed laws of electrolysis. http://atomictimeline.net/ -
Henri Becquerel
Discovered radiation by studying the effects of x-rays on photographic film. http://www.barcodesinc.com/articles/timeline-on-atomic-structure.htm -
JJ Thomson
He discovered the electron. He developed the Plum Pudding Model. This has helped people better understand the atom and its makeup. https://the-history-of-the-atom.wikispaces.com/J.J.+Thomson -
Marie Curie
Studied uranium and throium and called the decay process "radioactivity". Her and her husband discovered the radioactive elements poloniumand radium. http://atomictimeline.net/ -
Max Planck
Proposed the idea of quantization to explain how a hot glowing object emmited light. http://www.barcodesinc.com/articles/timeline-on-atomic-structure.htm -
Plum Pudding Model
Proposed by JJ Thomson -
Albert Einstein
In 1905 he proved mathematically that atoms existed. He also published the famous equation "E=mc 2". http://ansnuclearcafe.org/2012/03/20/albert-einstein-and-the-most-elemental-atomic-theory/ -
Robert Millikan
He performed the Oil drop experiment.He used the Oil drop experiment to measured the charge of an electron. https://www.boundless.com/chemistry/textbooks/boundless-chemistry-textbook/atoms-molecules-and-ions-2/discoveries-leading-to-nuclear-atom-model-33/millikan-s-oil-drop-experiment-199-3679/ -
Ernest Rutherford
He discovered the nucleus of the atom. Rutherford discovered the concept of the radioactive half life. He also differentiated and named alpha and beta radiation. Rutherford is credited for performing the first splitting of an atom. https://www.timetoast.com/timelines/64984 -
Planetary Model
Proposed by Niels Bohr. -
Niels Bohr
Bohr explained what happens inside an atom and developed a picture of atomic structure. Bohr's greatest contribution to modern physics was the atomic model. http://www.livescience.com/32016-niels-bohr-atomic-theory.html -
Louis DeBroglie
He suggested that electrons have wave properties in addition to particle poperties. http://atomictimeline.net/ -
Electron Cloud Model
Proposed by Erwin Schrodinger. -
Quantum Mechanical Model
Proposed by Erwin Schrodinger. -
Ernest Schrodinger
Viewed electrons as continuious clouds. He introduced wave mechanics as a mathmetical model of the atom. He formulated the wave-equation that accurately gave the energy levels of atoms. http://www.nobelprize.org/nobel_prizes/physics/laureates/1933/schrodinger-facts.html -
James Chadwick
Discovered neutrons, particles whose mass was close to that of a proton. http://www.barcodesinc.com/articles/timeline-on-atomic-structure.htm -
Otto Hahn
Known as the Father of nuclear chemistry. Along side Lise Meitner and Strassman, they discover nuclear fission. http://www.barcodesinc.com/articles/timeline-on-atomic-structure.htm -
Lise Meitner
Along side Otto Hahn and Strassman, they discover nuclear fussion by splitting atoms. -
Glan T. Seaborg
(1941-51) He synthesized 6 transuranium elements and suggested a change in the layout of the periodic table. http://atomictimeline.net/index.php
