Minooka Valence Electros

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Minooka Valence Electros

  1. 1. Valence Electrons Eight is Great
  2. 2. Valence Electrons <ul><li>Are the outermost electrons on an atom </li></ul><ul><li>Are in the outermost energy level </li></ul><ul><li>Are the electrons that are lost or gained to form ions </li></ul>
  3. 3. Stable Configuration <ul><li>Atoms are most stable with 8 valence electrons (except H and He like 2 valence electrons) </li></ul><ul><li>Atoms will gain or lose electrons to achieve this stable condition (configuration) </li></ul><ul><li>Atoms will bond to achieve this configuration </li></ul>
  4. 4. Complete valence shell <ul><li>A complete valence shell has 8 electrons </li></ul><ul><li>H and He have 2 electrons </li></ul><ul><li>H can have no electrons </li></ul><ul><li>The next lowest row has a complete valence shell </li></ul>
  5. 5. Metals <ul><li>If an atom has one valence electron… </li></ul><ul><ul><li>It could lose 1 or gain 7 electrons </li></ul></ul><ul><ul><li>It loses one negative electron… </li></ul></ul><ul><ul><ul><ul><li>Becoming more positive </li></ul></ul></ul></ul>
  6. 6. Non-metals <ul><li>If an atom has seven valence electrons… </li></ul><ul><ul><li>It could lose 7 or gain 1 electron </li></ul></ul><ul><ul><li>It gains one negative electron… </li></ul></ul><ul><ul><ul><li>Becoming more negative </li></ul></ul></ul>
  7. 7. Flame Test Notes <ul><li>Ground State - the lowest energy state of an electron </li></ul><ul><li>The most stable state for each electron </li></ul><ul><li>Takes the least amount of energy </li></ul>
  8. 8. Important Information to the Lab <ul><li>If an electron acquires additional energy it becomes excited and moves into a higher energy state. </li></ul><ul><li>It will fall quickly back to the ground state while emitting a PHOTON of light </li></ul><ul><li>The amount of energy associated with the photon results in the different colors of light being emitted. </li></ul>
  9. 9. Excited State <ul><li>The condition of an atom in a higher energy state than a ground state </li></ul><ul><li>Must put energy into the atom (heat) </li></ul><ul><li>Same amount of energy is released as light energy (quanta) </li></ul>

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