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Chemistry Review Chapters 4 & 19

John Dalton Dalton's Atomic Theory
Dalton's Atomic Theory All elements are made of tiny indivivisible particles called atoms. All atoms of a given element are identical, but atoms of one element differ from atoms of other elements. Atoms can be neither created or destroyed during a chemical reaction.
Law of the Conservation of Mass Antoine Lavoisier
The Law of Definite Proportions Joseph Proust
The Law of Multiple Proportions John Dalton
Aristotle Matter is continuous
Democritus 1st to propose the existance of atoms
Albert Crooke Inventor of the Cathode Ray Tube (CRT)
J.J. Thompson Modified the Cathode Ray Tube and made many experiments using cathode rays that Crooke had invented.
Plum Pudding Model of the Atom Formulated by J.J. Thompson
Eugene Goldstein Discovered Canal Rays. Also modified the CRT and demonstrated that a positive charges were left behind. This led him to discover the CATION.
Robert Milliken Measured the charge of an electron.
Henri Bequerel Discovered Radioactivity
Marie Curie discovered Radium (Ra) and Polonium (Po)
William Roentgen discovered X-Rays
Ernest Rutherford Conducted the "Gold Foil Experiment"
Who found these things? 1. Discovered the nucleus. 2. The nucleus has a positive charge. 3. The nucleus contains the majority of the mass of the atom. 4. The atom is mostly empty space. Ernest Rutherford
James Chadwick Discovered the neutron
Geiger Counter a device used to measure radioactivity
Scintillation Counter another device used to measure radioactivity
Badges Yet a third device to measure radioactivity
Diatomic/Polytomic Elements H (2), O (2), N (2), F (2), Cl (2), Br (2), I (2), S (8), P (4)
Allotropes Same element, different structural formula. Example: O(3) = Ozone - - derived from the diatomic Oxygen
Created by: GAntonini



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