1 / 10

Lewis Dot Structure

How to create a…. Lewis Dot Structure. …for CH 4. #1 Count the total number of valence electrons in the molecule C: 4 electrons x 1 atom = 4 valence electrons H: 1 electron x 4 atoms = 4 valence electrons Total = 8 valence electrons. How to create a…. Lewis Dot Structure. …for CH 4.

thao
Download Presentation

Lewis Dot Structure

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How to create a… Lewis Dot Structure …for CH4 • #1 Count the total number of valence electrons in the molecule • C: 4 electrons x 1 atom = 4 valence electrons • H: 1 electron x 4 atoms = 4 valence electrons • Total = 8 valence electrons

  2. How to create a… Lewis Dot Structure …for CH4 • #2 Find the number of “octet” electrons for the molecule. • C: 8 octet electrons x 1 atom = 8 octet electrons • H: 2 octet electrons x 4 atoms = 8 octet electrons • Total = 16 octet electrons • Rules: Hydrogen always has 2 octet electrons • Beryllium always has 4 octet electrons • Boron wants 6 for neutral molecules (8 if it’s an anion)

  3. How to create a… Lewis Dot Structure …for CH4 #3 Subtract the number of valence electrons from the number of octet electrons to find the number of bonding electrons. 16 – 8 = 8 bonding electrons

  4. How to create a… Lewis Dot Structure …for CH4 • #4 Divide the number of bonding electrons by 2 to find the number of bonds in the molecule. • 8 / 2 = 4 bonds in CH4 • Why 2? • Because there are two electrons in every covalent bond!

  5. How to create a… Lewis Dot Structure …for CH4 #5 Draw an arrangement of atoms that has the number of bonds you found in step 4. Of course, there are more rules… Hydrogen and Halogens = bond once! Oxygen’s family and Beryllium bond twice in neutral molecules Nitrogen’s family and Boron bond 3 times in neutral molecules Carbon’s family = bonds 4 times!

  6. How to create a… Lewis Dot Structure …for CH4 More hints… If you bond everything together and you have bonds left over, look for double/triple bonds. The atom nearest to the left side of the periodic table is probably in the middle of the molecule.

  7. Draw the Lewis structures for the following compounds: H2O CCl4 NH3 CO2 PCL3

  8. Draw the Lewis structures for the following compounds: N2 CH4 C2H6 CH3OH BH3

  9. Draw the Lewis structures for the following compounds: PBr3 N2H2 C2H2 SiH4 C2H4

  10. Draw the Lewis structures for the following compounds: HF HCl CCl2F2

More Related