How are Molecules Depicted? - Belle Vernon Area School District

How are Molecules Depicted? - Belle Vernon Area School District

How are Molecules Depicted? 6.2 Lewis Structures Valence e- = an e- in the outermost E level of an atom and determines the chemical properties Lewis Structure = a structure in which e- are represented by dots: dot pairs or dashes b/t 2 atomic

symbols represents pairs in covalent bonds Lewis Structure Single Bond = covalent bond in which one pair of e-s are shared b/t 2 atoms Unshared pairs = a nonbonding pair of valence e- not involved in bonding to another atom

Simple Lewis Structures Draw the Lewis structures for the following elements K, Sr, Al, Kr, P, O Remember e- want to be as far apart as possible How to draw LS for more complex molecules 1. Draw the LS for each element 2. Put least electronegative

element in center 3. Arrange other elements around central atom to satisfy octet (H only needs 2) 4. Change dots to lines to show bonds b/t atoms Practice Try drawing the Lewis structures for NH3 CH4 H2O

CH2F2 Worksheet on Lewis Structures! F2 O2 N2 C2H4 Multiple Bonds Used when single bonds dont satisfy octets for each atom Resonance structure a

possible Lewis structure of a molecule when more than 1 L.S. is possible Delocalized e- shared b/t more than 2 atoms Practice Ca KBr CO2 HCN

Lewis Structures with Ions! NH4+ CNCO32OH- Naming Covalent Compounds Inorganic molecular compounds Specify # of each type of atom P4O6 Tetraphosphorus hexoxide P4O10 Tetraphosphorus decoxide C

o v a l e n t p r e f

i x e s Mono Di Tri Tetra Penta Hexa

Hepta Octa Nona Deca 1 2 3 4 5 6

7 8 9 10 Naming Covalent Compounds If there is 1 of the first element, mono is omitted from the word CO carbon monoxide CO2 carbon dioxide

Naming Covalent Compounds 1st element named 1st usually least e-neg 2nd element named 2nd usually most e-neg add ide ending Drop vowels o and a from prefix before adding it to a root that starts with a vowel Naming Covalent Compounds N2O4 Dinitrogen tetroxide

SF6 Sulfur hexafluoride Some common names are used instead of technical name H2O water not dihydrogen monoxide

Recently Viewed Presentations

  • Pathways Learning Experience - District 101 Toastmasters

    Pathways Learning Experience - District 101 Toastmasters

    The Toastmasters strategic leader has a vision that is both attainable and inspiring. He or she is able to bring about positive changes by inspiring others to get involved and help.) Leading and Managing(There are different skill sets needed for...
  • Rebranding Liverpool

    Rebranding Liverpool

    Rebranding Liverpool. Why was there a need for Liverpool to rebrand? The main reason for Liverpool to rebrand was because it was made into the European Capital of Culture in 1998 to enable the city to generate more money, and...
  • ASSIST TRAINING The entire ASSIST user guide can

    ASSIST TRAINING The entire ASSIST user guide can

    When you are in "edit" mode, the option to save is at the bottom of each action tab. If you select "Save and Keep Lock" no one else will be able to edit the form until you go back in...
  • Accommodations for Aggressive Youth within School Settings

    Accommodations for Aggressive Youth within School Settings

    less likely to use aggression . to solve problems, and the type of aggression they do use becomes more sophisticated. In early childhood, children frequently rely on physical aggression, but as they mature, they begin to use more verbal aggression...
  • Title of presentation | 10 April 2015 |

    Title of presentation | 10 April 2015 |

    Eliason. v Henshaw. 4 Wheaton 225 (1819) (send answer by same wagon not mail). Consider adding a boilerplate provision to contracts which states that, in the event that the parties sign and exchange contracts electronically, the parties consent to the...
  • Introduction to Cloud Dynamics

    Introduction to Cloud Dynamics

    Condensation in the Atmosphere The atmosphere contains a mixture of dry air and a variable amount of water vapor (0-4% or 0-30 g/kg) An air parcel is said to be "saturated" with liquid water when sufficient numbers of molecules exist...
  • Predicting and Valuing Default - University of Arizona

    Predicting and Valuing Default - University of Arizona

    In practice, the Moodys KMV model is probably the most widely used variant. While the KMV model is proprietary, much has been written about it by Moodys economists. KMV Features The benchmark riskfree rate is the swap curve--not the Treasury...
  • 投影片 1 - pcstar.com.tw

    投影片 1 - pcstar.com.tw

    源起… Uniqlo 指的就是「Unique Clothing Warehouse」,縮寫為「UNI-CLO」, 而在1988年,Uniqlo於香港設立商品採購公司時,由於註冊 ...