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Daily Science pg. 40

Daily Science pg. 40. Why do scientist use electron configurations and orbital diagrams? Write the electron config . and orbital diagrams for the following elements: Potassium, Nitrogen, Nickel, Argon, Gallium, and Zinc

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Daily Science pg. 40

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  1. Daily Science pg. 40 • Why do scientist use electron configurations and orbital diagrams? • Write the electron config. and orbital diagrams for the following elements: • Potassium, Nitrogen, Nickel, Argon, Gallium, and Zinc • How could you tell from an electron configuration what element is being shown? • Which element has this configuration: • 1s2 2s2 2p6 3s2 3p6 4s2 3d7

  2. Electron Configurations Pg. 39

  3. Short-hand notation Start with the noble gas before the element and put it in brackets. This represents the electron configuration up to that point (ex. [Ne]) Write the rest of the electron configuration afterward. Ex. Na- [Ne] 3s1

  4. Exceptions There are some elements such as chromium and copper whose electron configurations are out of order. They are more stable if you fill or half-fill their last orbital Write electron configurations for chromium and copper

  5. Complete worksheet and attach to page 40

  6. Valence Electrons Pg. 41

  7. Valence Electrons Determine chemical properties of an element Electrons in the outer most energy level To find valence electrons, add all numbers in the highest energy level. All atoms want filled valence shells (usually 8 electrons) Write electron configurations for Li and Na. Be and Mg. B and Al. C and Si. N and P. O and S. F and Cl. Ne and Ar.

  8. Lewis Dot diagrams Also called electron dot structures Write element symbol Use dots to represent valence electrons One dot must go on each side before you can fill in second dot

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