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Atomic Structure

Atomic Structure. Neils Bohr…who’s that guy?. Current Atomic Structure. Current atomic structure is attributed to scientist Neils Bohr. Bohr theorized that electron motion could not be predicted, but that we could determine where we could find them. Bohr called these areas….

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Atomic Structure

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  1. Atomic Structure Neils Bohr…who’s that guy?

  2. Current Atomic Structure • Current atomic structure is attributed to scientist Neils Bohr • Bohr theorized that electron motion could not be predicted, but that we could determine where we could find them Bohr called these areas… ELECTRON CLOUDS

  3. Electron clouds • There are 7 clouds, but we will only cover 4 because they can overlap becoming too advanced • Each cloud is limited to how many electrons it can hold… 8 2 Cloud 1 Cloud 3 18 8 Cloud 4 Cloud 2

  4. Atomic structure practice 7 • If you had electrons we would fill the 1st cloud with electrons 2 5 • The remaining electrons would go in the 2nd cloud

  5. ELECTRON CLOUD RULES If the outermost cloud has NOT been completely filled, the atom/element is considered REACTIVE! If the outermost cloud IS completely filled, the atom/element is considered UNREACTIVE!

  6. Practice! 2 CLOUD 1 = 11 11 P= 8 CLOUD 2 = Na 11 E= 1 CLOUD 3 = n= 12 23.0

  7. DRAWING A BOHR MODEL STEP 1: DETERMINE PROTONS, NEUTRONS, AND ELECTRONS STEP 2: DRAW A NUCLEUS (ABOUT THE SIZE OF A NICKEL) STEP 3: WRITE PROTONS AND NEUTRONS INSIDE THE NUCLEUS STEP 4: START DRAWING AND FILING IN ELECTRON CLOUDS WITH DOTS FOR ELECTRONS

  8. Practice! Cloud 1 **Can hold ______electrons Reactive/ Unreactive? P= 1 1 H 1 E= 1 0 n= 2 e 1p 0n

  9. Practice! Cloud 1 **Can hold ______electrons Reactive/ Unreactive? P= 2 2 He 2 E= 4 2 n= 2 e 2p 2n e

  10. Practice! 2 Cloud 1 Cloud 2 **Can hold _____electrons Reactive/ Unreactive? P= 7 7 N 7 E= 14 7 n= e 8 e e 7p e 7n e e e

  11. Practice! 2 Cloud 1 Cloud 2 **Can hold _____electrons Reactive/ Unreactive? P= 10 10 Ne 10 E= 20 10 n= e e 8 e e e 10p e 10n e e e e

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