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What Scientist Idea’s are best represented by the chocolate chip cookie?

What Scientist Idea’s are best represented by the chocolate chip cookie? What do the chocolate chips represent? Is this model accurate today? Explain!. Bohr & Electron Shells. What did we learn last class about Bohr’s ideas?. BIG IDEA: electrons are in specific shells

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What Scientist Idea’s are best represented by the chocolate chip cookie?

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  1. What Scientist Idea’s are best represented by the chocolate chip cookie? • What do the chocolate chips represent? • Is this model accurate today? Explain!

  2. Bohr & Electron Shells

  3. What did we learn last class about Bohr’s ideas? • BIG IDEA: electrons are in specific shells • Electrons only exist in shells • Electrons can move between shells • Adding energy moves electrons to shells further from nucleus • Removing energy moves electrons to shells closer to nucleus (atom becomes more stable • The number of shells in an atom depends on the number of electrons

  4. Drawing electrons in shells • The first shell (the one closest to the nucleus) can only hold 2 electrons • The second and third shells can hold a maximum of 8 electrons • Innermost shells must be full before electrons can begin to occupy outer shells

  5. Electrons, Shells and Energy • When energy is added to an atom electrons “jump” from one shell to the next • The atoms re-emit the energy as light! = An EMISSION SPECTRIUM • This pattern of light emitted is unique for every atom! (like a fingerprint)

  6. Let’s see this for ourselves! It’s EXPERIMENT TIME!! !  • Getting started:  Read pg 209 to complete pre-lab questions • Listen to teacher’s instructions for equipment & safety • Follow All Lab Procedures e

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