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Chemistry

Chemistry. Unit Three, Day Four Kimrey 20 September 2012. Electron Configuration. What is the electron configuration for: Si Fe Ne. Noble Gases. In the last group of the periodic table He, Ne, Ar , Kr, Xe , and Rn Full outer energy levels. Noble Gas Configuration.

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Chemistry

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  1. Chemistry Unit Three, Day Four Kimrey 20 September 2012

  2. Electron Configuration • What is the electron configuration for: • Si • Fe • Ne

  3. Noble Gases • In the last group of the periodic table • He, Ne, Ar, Kr, Xe, and Rn • Full outer energy levels

  4. Noble Gas Configuration • Write out the e- configuration for Beryllium and Helium. • Short Cut!!!!! • Write the element symbol. • Write the symbol of the noble gas before your desired element in [ ]. • Pick up the e- configuration after the noble gas.

  5. Example • What is the noble gas notation of calcium?

  6. You Try • Write the noble gas notations for the following: • Cl • F • I

  7. Valence Electrons • Valence electrons: the electrons in the highest energy level that are responsible for bonding and forming ions. • Write out the e- configuration and add up those that are in the highest energy level.

  8. Example • How many valence electrons in Magnesium?

  9. You Try • Determine the number of valence electrons for: • C • B • Si

  10. Lewis Dot Diagrams • Visually expresses the number of valence electrons. • Write the symbol for the element • Pretend the symbol is in a box and draw a dot each line for every valence electron.

  11. Example • Draw the Lewis dot structure for Oxygen.

  12. You try • Write the Lewis dot diagrams for the following: • Ca • Si • Fe

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