1. Go to the Phet simulation Build a molecule and see how molecules are attached and what the rules are for formulae.
(HInt : you will likely get a message that says it was blocked from running… go to the apple (top left) and click Preferences >Security and privacy > Open Anyway. Unless you have a lot of time, choose Update Java LATER)
Write down a few sentences and maybe a diagram or two to show what you discover.
2. Get a model building kit for your table.
Follow the instructions from the handouts at the front of the room to build molecules with the kits. Record what you make, and the shapes formed.
3. What are the similarities and differences between the models (online and plastic)?
Which is clearer? Why?