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Bohr Model Starter:

Bohr Model Starter:. What do you picture when you think of an atom? (What does it look like?). Practice: Bohr’s Model of the Atom. How to draw the model. +. Bohr’s Atomic Theory. The Bohr model was a modification of the Rutherford model.

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Bohr Model Starter:

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  1. Bohr ModelStarter: What do you picture when you think of an atom? (What does it look like?)

  2. Practice:Bohr’s Model of the Atom How to draw the model

  3. + Bohr’s Atomic Theory • The Bohr model was a modification of the Rutherford model. • Bohr however put the electrons in certain circular orbits around the nucleus called shells.

  4. Bohr’s Atomic Theory • Protonsandneutronsarefoundinthenucleus. • Electrons orbit the nucleus in various shells. • Everything else is empty space. Nucleus 1st shell 2nd shell 3rd shell 0 + Empty space

  5. Nucleus 1st shell 2nd shell 3rd shell + Empty space Bohr’s Atomic Theory • Each of the shells has a maximum number of electrons that it can hold. 2 electrons 8 electrons 18 electrons

  6. Bohr’s Atomic Theory Ex.1) Draw a Bohr model of Hydrogen-1. Step-1 Draw a circle to represent the nucleus. Step-2 Determine the number of protons and neutrons and place them in the nucleus. Step-3 Draw a circle around the nucleus to represent the electron shell. Step-4 Place the electron in the shell. 1p 0n e- H-1

  7. Bohr’s Atomic Theory Ex.2) Draw a Bohr model of Helium-2. Step-1 Draw a circle to represent the nucleus. Step-2 Determine the number of protons and neutrons and place them in the nucleus. Step-3 Draw a circle around the nucleus to represent the electron shell. Step-4 Place the electron in the shell. 2p 2n e- e- Helium-2

  8. Bohr’s Atomic Theory Ex.3) Draw a Bohr model of Lithium-3. Step-1 Draw a circle to represent the nucleus. Step-2 Determine the number of protons and neutrons and place them in the nucleus. Step-3 Draw circles around the nucleus to represent the electron shells. Step-4 Place the electrons in the shells. 3p 4n e- e- e- Litium-3

  9. Bohr’s Atomic Theory Ex.4) Draw a Bohr model of Neon-10. Step-1 Draw a circle to represent the nucleus. Step-2 Determine the number of protons and neutrons and place them in the nucleus. Step-3 Draw circles around the nucleus to represent the electron shells. Step-4 Place the electrons in the shells. e- e- e- 10p 10n e- e- e- e- e- Neon-10 e- e-

  10. Application Using the Atom Game board you will build the following atoms: Sodium Neon Boron Aluminum Write the elements Name, Atomic #, Protons, Electrons and Neutrons in you journal BEFORE using the game board.

  11. Connection How did “building” your atoms help you understand Bohr’s model?

  12. Exit What are the limitations of Bohr’s model?

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