Chapter 2 notes - CHM 1025 Chapter 2 Part A 1 Atomic theory...

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Chapter 2 Toyota 1 CHM 1025 Chapter 2 Part A 1. Atomic theory – developed by a. Summarized known information about atoms b. Postulates: i. . ii. . iii. . iv. . 2. Deductions: a. Element – b. Compound – 3. 3 Laws a. Law of Conservation of Mass b. Law of Constant Composition (definite composition) c. Law of Multiple Proportions 4. Atomic Symbols : 1 or 2 letter notations as shorthand to represent element names a. Always Capital—Small. E.g. Au or Hg 5. Subatomic particles are smaller particles found inside the atom; the three most important in chemical behaviour are the electron, proton, and neutron. a. Discovery of subatomic particles and the structure of the atom i. Electron —the negatively charged subatomic particle was discovered by _____________ in 1897 1. Cathode ray tube (CRT) experiment: saw that the cathode ray was straight in the absence of a electric field, but that it bent towards the positive plate when a field was applied regardless of the material used to generate the cathode rays—matter comprises
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Chapter 2 notes - CHM 1025 Chapter 2 Part A 1 Atomic theory...

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