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Antoine Lavoisier
Law of Conservation, The law states that matter cannot be made or destroyed.He began the conversation on what an atom was exactly. -
Joseph Louis Proust
Law of Definite Proportions, states that the ratio of elements in a compound is always the same/constant. belived matter could be put together in certain patterns to make bigger, different, unique matter. He set it up for Dalton to create the Law of Multiple Proportions -
john Dalton
6 parts to is theory was...mtter is composed of extremely small particles called atoms..atoms are indivisible and indestructable..atoms of a given element are identical in size, mass, and chemical properties..atoms of specific elements are different thatn those of other elements..in a chemical reaction, atoms separate, combine and/or rearrange -
Michael Faraday
an English scientist who contributed to the fields of electromagnetism and electrochemistry. His main discoveries include those of electromagnetic induction, diamagnetism and electrolysis -
Marie Curie
she discovered that Therium also emitted radiation, and further, that the amount of radiation depended upon the amount of element present in the compound.she deduced that radioactivity does not depend on how atoms are arranged into molecules, but rather that it originates within the atoms themselves -
Henri Becquerel
While studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decompose and give off very pentrating rays. -
J.J.Thomson
Thomson proposed a model, sometimes called the "plum pudding".... in which thousands of tiny, negatively charged corpuscles swarm inside a sort of cloud of massless positive charge. This theory was struck down by Thomson's own former student, Ernest Rutherford. -
Albert Einstein
Published the famous equation E=mc 2 -
Robert Milikan
Millikan's oil-drop apparatus, was an experiment performed by Robert A. Millikan and Harvey Fletcher in 1909 to measure the elementary electric charge (the charge of the electron). -
Ernest Schrodinger
he combined the equations for the behavior of waves with the de Broglie equation to generate a mathematical model for the distribution of electrons in an atom.The Bohr model -
Ernest Rutherford
The gold foil experiment. consisted of shooting Alpha atoms into extremely thin gold foil and seeing where on the surrounding circular wall it hit. There was something in the center of the atoms, called the nucleus. -
Max Planck
he was a German theoretical physicist who originated quantum theory, -
Niels Bohr
he suggested that electrons didn't spiral into the nucleus, but orbit in different levels. This is called the bohr model, or the quantum model. -
Louis DeBroglie
he was a French physicist who made groundbreaking contributions to quantum theory. In his 1924 PhD thesis he postulated the wave nature of electrons and suggested that all matter has wave properties -
James Chadwick
Chadwick discovered neutrons.They differed from alpha rays because they repelled considerable electrical forces that are in the nucleus of many heavy atoms. -
Lisa Meitner
Conducted experiments verifying that heavy elements capture neutrons and form unstable products which undergo fission. This process ejects more neutrons continuing the fission chain reaction. -
otto hahn
He became one of the first to recognize that the uranium atom, when bombarded by neutrons, actually split. -
Glen T. Seaborg
Synthesized 6 transuranium elements and suggested a change in the layout of the periodic table.
