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Joseph Proust
-Came up with Law of Definite Proportions
-Turned elements into other elements (Zinc into Gold)
-He created a synthetic Copper -
John Dalton
-Atoms cannot be created or destroyed
-Atoms of different elements join together to create chemical compounds
-In chmeical reactions atoms are separated, rearagnged, or combined -
Amedeo Avogadro
-He better defined the difference between Weight and Mass
-His law says "the relationship between the masses of the same volume of different gases corresponds to the relationship between their respective molecular weights. Hence, the relative molecular mass of a gas can be calculated from the mass of sample of known volume." -
Dimitri Mendeleev
-Said Elements with simular chemical properties have simular atomic wieghts
-The magnitude of atomic wieght determines the character of an element
-Certain characteristics of an element can be predicted by its atomic weight -
JJ Thomson
-Discovered the Electron
-Discovered you could deflect a ray with an electric field
-Found that Hydrogen only has one Electron
-Found the naturally radioactivity of potassium -
Marie Curie
-She was the first woman to win a Noble Peace Prize
-She discovered Polonium and Radium
-She helped treat Neoplasms with Radioactive Isotopes -
Hans Geiger
-He diiscovered the Atomic Nucleus
-Created the Geiger Counter
-Helped in the "Gold Foil Expeiriment" -
Ernest Rutherford
-He discovered what a radioactive half-life
-Proved that Radioactivity had something to do with elements changing
-He was the first one to split an atom
-He discovered the Proton -
Neils Bohr
-He compared the structure of an atom to the structure of a solar system
-He thought Electrons moved from one energy level to another
-The element Borhium was named after him after he had predicted its existance
-He worked on the Manhatten Project -
Enrico Firmi
-Worked on the Manhatten project
-He created the Difusion Equation
-He worked with Nuclear Fusion
-He claimed to have created a new element but it was hust a Nuclear Fission
