1 / 17

Investigation 7A

Investigation 7A. Lewis Structures. Each water molecule contains one oxygen atom and two hydrogen atoms. One central oxygen atom. Why can’t a water molecule be like this?. One hydrogen atom on either side. Investigation 7A: Lewis Structures. How do bonds form?.

nigel-phelps
Download Presentation

Investigation 7A

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. Investigation 7A Lewis Structures

  2. Each water molecule contains one oxygen atom and two hydrogen atoms. One central oxygen atom Why can’t a water molecule be like this? One hydrogen atom on either side Investigation 7A: Lewis Structures

  3. How do bonds form? How many valence electrons does a hydrogen atom have? How many valence electrons does an oxygen atom have? How many electrons are available for bonding in hydrogen? What about in oxygen? Investigation 7A: Lewis Structures

  4. How do bonds form? Investigation 7A: Lewis Structures

  5. How do bonds form? Investigation 7A: Lewis Structures

  6. Part 1: Introduction to Lewis dot diagrams Bonding patterns depend on the number of valence electrons. Paired electrons do not make bonds. Investigation 7A: Lewis Structures

  7. Part 1: Introduction to Lewis dot diagrams • How many bonds should a hydrogen atom normally make? • How many bonds should a lithium atom normally make? • How many bonds should a carbon atom normally make? • How many bonds should a nitrogen atom normally make? • How many bonds should an oxygen atom normally make? • How many bonds should a helium atom normally make? Investigation 7A: Lewis Structures

  8. Part 2: Molecules and Lewis structures Each group of 3 or 4 students should have 1 modeling kit How many holes does a red ball have? How many holes does a black ball have? How many holes does a blue ball have? How many holes does a white ball have? Investigation 7A: Lewis Structures

  9. Part 2: Molecules and Lewis structures Can you guess which ball represents which type of atom? Investigation 7A: Lewis Structures

  10. Part 2: Molecules and Lewis structures Chemical formula: H2O Common name: water Structural diagram: Lewis dot structure: H O H Investigation 7A: Lewis Structures

  11. Part 2: Molecules and Lewis structures Build the following molecules: What type of bond is this? Chemical formula ________________ Commonname _________________ Chemical formula ________________ Commonname _________________ Ethanol Oxygen Investigation 7A: Lewis Structures

  12. Part 2: Molecules and Lewis structures Build the following molecules: Chemical formula ________________ Commonname _________________ Chemical formula ________________ Commonname _________________ Formaldehyde Dichloroethylene Investigation 7A: Lewis Structures

  13. Part 3: Lewis structures from models Build the following molecules: Chemical formula __________________ Commonname ___________________ Lewis structure Chemical formula __________________ Commonname ___________________ Lewis structure Ethene Acetic acid Investigation 7A: Lewis Structures

  14. Part 3: Lewis structures from models Build the following molecules: Chemical formula __________________ Commonname ___________________ Lewis structure Chemical formula __________________ Commonname ___________________ Lewis structure Methylamine Ethanol Investigation 7A: Lewis Structures

  15. Part 4: Molecules with different structures What is the chemical formula for a molecule made of the following atoms? Investigation 7A: Lewis Structures

  16. Part 4: Molecules with different structures What is the chemical formula for a molecule made of the following atoms? Create two different molecules, each with that same chemical formula.Each structure must use all available bonding sites on all atoms. Be creative!Many diverse compounds can be created using these 8 atoms. Investigation 7A: Lewis Structures

  17. Part 4: Molecules with different structures What is the chemical formula for a molecule made of the following atoms? Create two different molecules, each with that same chemical formula.Each structure must use all available bonding sites on all atoms. Create the Lewis structure for both of your molecules. Investigation 7A: Lewis Structures

More Related