<ul><li>Chemistry Assessment </li></ul><ul><li>Eligible Texas Essential </li></ul><ul><li>Knowledge and Skills </li></ul>T...
<ul><li>Readiness standards   have the following characteristics. </li></ul><ul><li>They are essential for success in the ...
<ul><li>Supporting standards   have the following characteristics. </li></ul><ul><li>Although introduced in the current gr...
<ul><li>TEA is implementing a number of changes that should serve to test knowledge and skills in a deeper way. </li></ul>...
 
 
Exploring Bonding For each of the following compounds, place the symbol of the first element in it’s spot on the periodic ...
Prior knowledge? <ul><li>Be able to classify elements as metals and nonmetals using the periodic table </li></ul><ul><li>B...
What should be taught? <ul><li>3 types of bonds  —  ionic, covalent, metallic </li></ul><ul><li>Formation of ions </li></u...
Geometry <ul><li>TEKS mentions linear, trigonal planar  and tetrahedral electron pair geometries. </li></ul><ul><li>Teach ...
What will constitute mastery? <ul><li>The student should be able to: </li></ul><ul><li>Identify type of bond—ionic, covale...
<ul><li>Name the compounds. </li></ul><ul><li>MgSO 4 PCl 5 FeCl 3 </li></ul><ul><li>Write the formula for these compounds....
<ul><li>What is the shape of sulfur trioxide? </li></ul><ul><li>linear </li></ul><ul><li>bent </li></ul><ul><li>trigonal p...
<ul><li>Determine the shape of the molecule.  </li></ul><ul><li>SO 2 </li></ul><ul><li>Count valence e - </li></ul><ul><li...
<ul><li>A substance is malleable, conducts electricity and is shiny.  These properties most likely are a result of </li></...
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Bonding

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Presented by Karen Compton, Jane Smith and Claudia Wallace in the ACT2 stand at CAST2010 in Houston, Texas

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Bonding

  1. 1. <ul><li>Chemistry Assessment </li></ul><ul><li>Eligible Texas Essential </li></ul><ul><li>Knowledge and Skills </li></ul>Texas Education Agency Student Assessment Division September 2010
  2. 2. <ul><li>Readiness standards have the following characteristics. </li></ul><ul><li>They are essential for success in the current grade or course. </li></ul><ul><li>They are important for preparedness for the next grade or course. </li></ul><ul><li>They support college and career readiness. </li></ul><ul><li>They necessitate in-depth instruction. </li></ul><ul><li>They address broad and deep ideas. </li></ul>Texas Education Agency Student Assessment Division September 2010
  3. 3. <ul><li>Supporting standards have the following characteristics. </li></ul><ul><li>Although introduced in the current grade or course, they may be emphasized in a subsequent year. </li></ul><ul><li>Although reinforced in the current grade or course, they may be emphasized in a previous year. </li></ul><ul><li>They play a role in preparing students for the next grade or course but not a central role. </li></ul><ul><li>They address more narrowly defined ideas. </li></ul>Texas Education Agency Student Assessment Division September 2010
  4. 4. <ul><li>TEA is implementing a number of changes that should serve to test knowledge and skills in a deeper way. </li></ul><ul><li>Tests will contain a greater number of items that have a higher cognitive complexity level . </li></ul><ul><li>Items will be developed to more closely match the cognitive complexity level evident in the TEKS . </li></ul><ul><li>In science, process skills will be assessed in context , not in isolation, which will allow for a more integrated and authentic assessment of these content area. </li></ul><ul><li>In science, the number of open-ended (griddable) items will increase to allow students more opportunity to derive an answer independently. </li></ul>Texas Education Agency Student Assessment Division September 2010
  5. 7. Exploring Bonding For each of the following compounds, place the symbol of the first element in it’s spot on the periodic table using one color of ink. Then, place the symbol of the second element in its spot on the periodic table using black ink. NaCl LiBr KF ZnCl 2 Fe 2 O 3 CuI 2 Al 2 S 3 <ul><li>What do you notice about the location of the first element in the compounds? Second element? </li></ul><ul><li>Based on your knowledge about the periodic table, would you classify the first element as a metal or nonmetal? The second element? </li></ul><ul><li>The compounds listed above are called ionic compounds. What is the definition of an ionic compound? </li></ul><ul><li>Circle the elements that are likely to combine with lead to form an ionic compound? </li></ul><ul><li>potassium bromine oxygen copper chlorine </li></ul>Engage
  6. 8. Prior knowledge? <ul><li>Be able to classify elements as metals and nonmetals using the periodic table </li></ul><ul><li>Be able to determine valence electrons </li></ul><ul><li>Draw a Lewis structure for an element </li></ul>
  7. 9. What should be taught? <ul><li>3 types of bonds — ionic, covalent, metallic </li></ul><ul><li>Formation of ions </li></ul><ul><li>Octet rule </li></ul><ul><li>Writing formulas for both ionic and covalent compounds </li></ul><ul><li>Nomenclature for ionic and covalent </li></ul><ul><li>Polar and nonpolar bonds and molecules </li></ul><ul><li>Properties of metals, ionic and covalent compounds </li></ul><ul><li>Intermolecular forces </li></ul>
  8. 10. Geometry <ul><li>TEKS mentions linear, trigonal planar and tetrahedral electron pair geometries. </li></ul><ul><li>Teach these shapes: </li></ul><ul><ul><li>Linear </li></ul></ul><ul><ul><li>Trigonal planar </li></ul></ul><ul><ul><li>Bent </li></ul></ul><ul><ul><li>Trigonal pyramidal </li></ul></ul><ul><ul><li>Tetrahedral </li></ul></ul>These all have tetrahedral electron pair distribution
  9. 11. What will constitute mastery? <ul><li>The student should be able to: </li></ul><ul><li>Identify type of bond—ionic, covalent, metallic </li></ul><ul><li>Name compounds </li></ul><ul><li>Write formulas given names </li></ul><ul><li>Draw Lewis structures for ionic and covalent compounds </li></ul><ul><li>Describe geometry of the molecular structure-- </li></ul><ul><li>Including linear, bent, trigonal planar, trigonal pyramidal, tetrahedral </li></ul><ul><li>Describe polarity of the bond and molecule </li></ul><ul><li>Identify intermolecular forces present </li></ul>
  10. 12. <ul><li>Name the compounds. </li></ul><ul><li>MgSO 4 PCl 5 FeCl 3 </li></ul><ul><li>Write the formula for these compounds. </li></ul><ul><li>ammonium nitrate </li></ul>
  11. 13. <ul><li>What is the shape of sulfur trioxide? </li></ul><ul><li>linear </li></ul><ul><li>bent </li></ul><ul><li>trigonal planar </li></ul><ul><li>trigonal pyramidal </li></ul><ul><li>This molecule can be classified as </li></ul><ul><li>ionic </li></ul><ul><li>covalent </li></ul><ul><li>chemical </li></ul><ul><li>metallic </li></ul><ul><li>Classify the S—O bond </li></ul><ul><li>electronegativity of sulfur = 2.5 and oxygen = 3.0 </li></ul><ul><li>Ionic </li></ul><ul><li>Covalent </li></ul><ul><li>Polar covalent </li></ul><ul><li>Metallic </li></ul>
  12. 14. <ul><li>Determine the shape of the molecule. </li></ul><ul><li>SO 2 </li></ul><ul><li>Count valence e - </li></ul><ul><li>Draw Lewis structure </li></ul><ul><li>Look at polarity of bonds using electronegativity values </li></ul><ul><li>Determine polarity of molecule </li></ul><ul><li>Describe intermolecular forces present </li></ul>To practice…
  13. 15. <ul><li>A substance is malleable, conducts electricity and is shiny. These properties most likely are a result of </li></ul><ul><li>Electrons being transferred </li></ul><ul><li>Electrons being shared </li></ul><ul><li>A sea of mobile electrons </li></ul><ul><li>Number of electrons equal number of protons </li></ul>
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