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ChemReview2
Chemistry Review Chapters 4 & 19
Question | Answer |
---|---|
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 |