Dec 8, 2009 - Physical Science
Chemistry of Matter Unit
Teacher Information:
Chemistry of Matter Unit- Intro Electron Dots, Ionic Bonds
Bell work:
In 1937 the Hindenburg airship burst into flames, killing 36 people. This airship was filled with hydrogen gas. Why is hydrogen so reactive? What gas would have been a better choice, and why?
Today:
Bell work- review valence electrons
Electron dot diagrams- p.21
Intro 2 types of chemical bonds- ionic & covalent
View Ionic video
Practice Electron Dot Diagrams
Public Information:
Quick discussion about the Hindenburg- blew up because Hydrogen is reactive- has an empty spot in its valence shell. Helium would be a better choice- no empty spot in its valence shell.
Quick intro to electron dot diagrams so that students understand what they're looking at in the ionic/covalent bonding video.
Discuss Ionic vs covalent bonds. Electrons transferred result in ions that then attract to each other (an ionic bond). Electrons shared is a covalent bond (stronger).
Practice electron dot diagrams and discuss if example elements are reactive (have empty spots in their valence shell) as we go.
Handouts:
jpg: Valence Orbitals
Valence Orbitals.jpg
doc: Teacher- Ionic and Covalent Bonding
Teacher- Ionic and Covalent Bonding.doc
ppt: Ion vs Covalent Bond Intro
Ion vs Covalent Bond Intro
jpg: Hindenburg_burning
Hindenburg_burning.jpg
Web Links:
http://www.mhhe.com/physsci/chemistry/animations/chang_7e_esp/bom1s2_11.swf
ionic vs covalent bonding flash animation
http://video.google.com/videosearch?hl=en&q=hindenburg&oe=UTF-8&um=1&ie=UTF-8&sa=N&tab=wv&oi=property_suggestions&resnum=0&ct=property-revision&cd=1#
Hindenburg video