1. June 4, 2016June 4, 2016June 4, 2016 GSCI 163 Spring 2010 What should a student have done?  Checked out website  Examined the Lon Capa homeworks  Found an intro science book OR  Decided to use the handouts  Reviewed what was covered and began reading  Generated at least one question to ask in class If you have difficulties with science an math then don’t fall behind!!

2. June 4, 2016June 4, 2016June 4, 2016 GSCI 163 Spring 2010 Other properties: Hardness Pliability (paper, rubber) Strength Divisibility REACTIONS Early studies tried to address the quantities of material involved. Properties of gases Mix readily Sometimes the react hydrogen and oxygen turn into water. A large volume of each turns into a small volume of water

3. June 4, 2016June 4, 2016June 4, 2016 GSCI 163 Spring 2010 Calculating the Volume of Water  Mix Hydrogen gas and Oxygen gas  How Much?  How much water?  Volume of water? Density?Density?  How many liters? 1 mole = 22 liters of each 1 mole + 1 mole ~ 1 mole 1 mole of water = 18 gm 1 gm per cubic cm 1 liter = 1000 cubic cm Right or Wrong ?? BOTH !! Back of the envelope calculation -numbers are approximate -H 2 O -Both hydrogen and oxygen are diatomic

4. June 4, 2016June 4, 2016June 4, 2016 GSCI 163 Spring 2010 Build an ATOM + - PROTON electron Hydrogen Proton I much heavier and determines the mass of the atom. Charges attract due to the electric force. Helium Protons close and strongly repelled. Must be something that holds nucleus together!! Atom is neutral. Twice as heavy as our atom. + - Neutron

5. June 4, 2016June 4, 2016June 4, 2016 GSCI 163 Spring 2010 Classroom Model  Excel spreadsheets  Build a hydrogen atom  Build a helium atom ( ignore the neutrons they only add mass and this has a very small impact on chemistry )  Consider neutrality  Does this model allow for any chemistry?  Build a periodic table based on this model.