1/15/10

Post date: Jan 15, 2010 6:31:18 PM

Bell Ringer: Steel has a density of about 8 g/mL. Why do boats made of steel float in water?

- Notes that Mr. Bennett forgot earlier:
  - pure substance - element or compound. Any substance with a fixed ratio of atoms.
  - chemical formulas - the letters are the chemical symbols (off the periodic table), the numbers tell how many of each atom there are in a molecule (example: C6H12O6 means 6 carbons, 12 hydrogens, and 6 oxygens)