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Updated: 11/20/2019
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Storyboard Text

  • good morning class! today we will be learning about the electronegativity and the polarity of molecules.
  • polarity and electronegativity
  • electro what?
  • polarity and electronegativity
  • you'll understand after today's lesson. polarity is the property of having poles. it is used to measure the electronegativity between a bond of two elements. electronegativity is the ability for the element to receive electricity. different types of electronegative bonds have different affects on molecules.
  • ionic bonds are where valance electrons are transferred between two metals. the properties of ionic bonds are cations and anions or SALTS. ionic bonds happen between a metal and a non-metal. covalent bonds are between two non-metals. the valance electrons in this type of bond are shared not transferred. the two types of properties of covalent bonds are polar and non-polar. the non-polar bonds are symmetrical and cancel each other out, it's neutral. everything else is polar.
  • polar covalent, non-polar covalent, and ionic bonding
  • the location of electrons gives off partial charges. the two types of partial charges are partial negative and partial positive. the more electronegative an atom is, the more it's partially negative and the less electronegative an atom is, the more it's partially positive. polar bonds have partial charges. a neutral atom has a formal charge.
  • δ+partial positive
  • charges
  • δ-partial negative
  • how do polar bonds relate to smells?
  • the type of polarity bond a molecule has determines if it has a smell. for example, small polar molecules have a smell: however small non-polar molecules don't have a smell. asymmetrical molecules usually have a smell. now do you understand more about electronegativity and polarity?
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