Chemical Bonding - 1

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This introduces chemical bonding to students preparing for IITJEE at http://youmarks.com

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Chemical Bonding - 1

  1. 1. copyrights © youmarks.com Chemical Bonding Part I
  2. 2. Electronegativity <ul><li>Electronegativity is the ability of an atom to attract shared electrons to itself. </li></ul><ul><li>It is largely the difference between the electronegativities of two atoms which determines what kind of bond is formed between them. </li></ul>copyrights © youmarks.com
  3. 3. Electronegativity <ul><li>What is the most electronegative element? </li></ul><ul><li>What is the least electronegative element (aside from </li></ul><ul><li>the noble gases)? </li></ul><ul><li>What is the range of electronegativity for the metals? </li></ul><ul><li>Metalloids? Nonmetals? </li></ul><ul><li>Why is the electronegativity of the noble gases listed </li></ul><ul><li>as zero? </li></ul><ul><li>For an electron shared between hydrogen and chlorine, </li></ul><ul><li>would you expect the electron to be closer to the </li></ul><ul><li>hydrogen or the chlorine? </li></ul><ul><li>(Discuss these problems in discuss problems section if you don’t know answer to any of the problem. Just post your doubt in chemsitry section) </li></ul>copyrights © youmarks.com
  4. 4. copyrights © youmarks.com Electronegativity
  5. 5. Chemical Bonding copyrights © youmarks.com
  6. 6. Chemical Bonding copyrights © youmarks.com
  7. 7. Types of Bonding copyrights © youmarks.com
  8. 8. Types of Bonding copyrights © youmarks.com
  9. 9. Types of Bonding copyrights © youmarks.com
  10. 10. Properties <ul><li>Chemical Bonding determines the physical properties of a compound. These properties are listed as in the next slide </li></ul>copyrights © youmarks.com
  11. 11. Physical Properties of Covalent Bonds <ul><li>Gas, liquid, or a soft solid. </li></ul><ul><li>Low melting point and low boiling point. </li></ul><ul><li>Insoluble in H2O </li></ul><ul><li>Soluble in nonpolar solvents. </li></ul><ul><li>Nonconductor of heat and electricity. </li></ul><ul><li>Nonlustrous </li></ul>copyrights © youmarks.com
  12. 12. Physical Properties of Ionic Bonds <ul><li>Crystalline solid. </li></ul><ul><li>Very high melting point. </li></ul><ul><li>Soluble in H2O. </li></ul><ul><li>Insoluble in nonpolar solvents. </li></ul><ul><li>Nonconductor of heat and electricity. </li></ul><ul><li>Conducts electricity in aqueous solutions. </li></ul><ul><li>Examples: NaCl, CaCO 3 </li></ul>copyrights © youmarks.com
  13. 13. Physical Properties of Metallic Bonds <ul><li>Malleable solid. </li></ul><ul><li>High melting point and boiling point. </li></ul><ul><li>Insoluble in H2O. </li></ul><ul><li>Insoluble in nonpolar solvents. </li></ul><ul><li>Conducts heat and electricity. </li></ul><ul><li>Lustrous </li></ul><ul><li>Examples: gold, copper </li></ul>copyrights © youmarks.com
  14. 14. In slides to come <ul><li>We will be discussing some topics in details in chemical bonding . In particular, things to cover in chemical bonding are: </li></ul><ul><li>Polar Bonds </li></ul><ul><li>Metallic Bonding </li></ul><ul><li>Intermolecular Forces </li></ul><ul><li>Ions: Counting Electrons And Protons </li></ul><ul><li>Ionic And Atomic Radii </li></ul><ul><li>Ions And Energy </li></ul><ul><li>Lithium Fluoride </li></ul><ul><li>Crystal Packing </li></ul><ul><li>Crystal Packing </li></ul><ul><li>Crystal Packing </li></ul><ul><li>Covalent H2 </li></ul><ul><li>Quantization </li></ul><ul><li>Bond Length And Strength </li></ul><ul><li>Strong And Weak Bonds </li></ul><ul><li>Strong And Weak Bonds </li></ul><ul><li>Covalent To Metallic </li></ul><ul><li>Electron Delocalization </li></ul><ul><li>Best of lucks. In the mean time, we may also be introducing some inorganic materials along with the chemical bonding series. </li></ul>copyrights © youmarks.com

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