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Journey of Elemental Origins: From Stars to Atoms

Explore the poetic concept that every atom in our body originates from stars. Delve into the history of atomic theories, the discovery of subatomic particles, and the structure of atoms. Discover how protons and electrons define elements and their properties. Engage in activities to understand atomic structure better.

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Journey of Elemental Origins: From Stars to Atoms

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  1. Where do elements come from? http://www.teachersdomain.org/resource/ess05.sci.ess.eiu.fusion/ “Every atom in your body came from a star that exploded. And, the atoms in your left hand probably came from a different star than your right hand. It really is the most poetic thing I know about physics: You are all stardust.” - Lawrence Krauss

  2. What’s inside an atom? • Greeks: atom • Dalton’s Atomic Theory (1766-1844) 1) 2) 3) 4) 5)

  3. Pair up! Complete the Atomic Pudding Worksheet (Skip questions 5 and 6)

  4. Subatomic particle #1: Electron • J.J. Thomson’s cathode ray (1897) Electron: http://www.youtube.com/watch?v=O9Goyscbazk

  5. Subatomic particle #2: Proton • Rutherford’s gold foil experiment (1911) Expected Actual Nucleus:

  6. Subatomic particle #3: Neutron Isotope Atomic number Mass number

  7. Models and theories can change over time 1913 1897 1911 1803 1918

  8. Protons identify an element, electrons tell you what it can do • Protons  • Electrons 

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