Dec 8, 2009 - Physical Science
Chemistry of Matter Unit
Chemistry of Matter Unit- Intro Electron Dots, Ionic Bonds
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?
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
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.