Week of 9/21/09

This week, we did a worksheet and handout called Life on the Edge. We learned about valence electrons and the shells of elements. There were also electrons called core electrons. We learned about trends in the periodic table like the sizes of atoms and ions, electronegativity, and ionization energy. the Ionization Energy is the emount of energy needed to remove an electron. Electron-greeiness is Electronegativity. This Friday, we will have a Unit 1 Test. I hope I do well. Also, today we saw sublimation from dry ice. the experiments we did were very cool. We saw bubbles form. What I thought that was the coolest was when the bubbles floated in the aquarium because the dry ice gave off carbon dioxide, so the bubbles were hovering over the ice. Today was a fun day.