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The Atom, Periodic Table, and Chemical Reactions

Explore the parts of an atom, learn how to use the Periodic Table to explain element characteristics, and understand the conservation of mass in chemical reactions. Discover the contributions of famous scientists and their models of atomic structure.

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The Atom, Periodic Table, and Chemical Reactions

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  1. The Atom, Periodic Table, and Chemical Reactions Mrs. Hooks Unit 3

  2. Learning Targets • 1. I can identify and describe the parts of an atom. • 2. I can use the Periodic Table to explain characteristics of individual elements. • 3. I can develop and use a model to describe how the total # of atoms does not change in a chemical reaction and thus mass is conserved.

  3. Famous Scientist 1. Democritus • Discovered the Atom 2. John Dalton • Came up with the Atomic Theory • Billiard Ball Model 3. J.J Thompson • Discovered the Electron • Plum Pudding Model 4.Rutherford • Discovered the Nucleus • Nuclear Model • Niels Bohr • Theory of Atomic Structure- Electrons are located in “Energy Levels”. • Bohr Model 6. LaVoiser • Law of Conservation of matter • “Matter cannot be created or destroyed, it only changes forms”

  4. Parts of the Atom • Atom- small particle that makes up matter • Subatomic Particles • 1. Proton- positively charged particle • Located in the nucleus • Equals the atomic number of an Element • 2. neutrons- particle with NO charge • Located in the nucleus • # of neutrons + # of protons = atomic mass • 3. Electrons- negatively charged particle • Located outside the nucleus on Energy Levels • # of Electrons = # of Protons Energy Level

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