Science 421 Wednesday, April 24

• Returned Assignments “Types of Chemical Reactions Lab”
• Reviewed Significant Figures (addition/subtraction and multiplication/division rules)
• Corrected Sheets “Measurement Worksheet” and “Significant Figures II”
• Complete Sheet “Significant Figures – A Review”
• In class assignment tomorrow “Metric conversions, scientific notation and significant figures”
• Notes/Discussion “Conversion Factors and Dimensional Analysis”
• Sheet “Unit Analysis Worksheet”  – One Step Problems

Chemistry 521 Wednesday, April 24

• Reviewed the octet rule, bonding electrons, lone pairs, Lewis diagrams of atoms, covalent bonding, ionic bonding.
• Corrected Sheet “G2 Lewis Diagrams for Molecules”.
• Notes/Discussion “Lewis Diagrams for Molecules” (Completed examples)
• Complete Lewis Diagrams and Structural Diagrams for  H2, chlorine, HCl, carbon tetrahydride, NI3, OF2, N2H4, dihydrogen dioxide, dicarbon hexahydride.
• Complete Sheet “Introduction to Structure and Properties (Review Questions)”