6. Monday, September 21, 2009 Leave a reply Ionic compounds, Polyatomic ions Read chapter 2 (70-82) OWL 2.7, 2.9, 2.10,3.1, 3.2 due Thur Sept 24 Lecture from today: Sept 21 I forgot to balance the chemical equation for Mg combustion: 2 Mg(s) + O2(g) –> 2 MgO(s)