CHEM 242A Study Guide - Comprehensive Final Guide: Periodic Trends, Atomic Orbital, Butane

• School: University of Arizona
• Department: Chemistry
• Course: CHEM 242A
• Professor: John Jewett

Document Summary

There is homework, but it is practice (there are recommended questions). Look to the quizzes because they are test questions being tried out. When you work in a group on a question, that question may be on the test. Angstro m (2 a) or 200 picome ter (200 pm) Kekule didn"t have a good understanding of how the hydrogens were associated with the carbon but understood that c has four bonds somehow. Erlenmyer understood that carbon oculd be associated with itself and c could have a triple bond with itself. Brown found that carbon can have a double bond with itself. Larger orbitals: more p character: sp3 has longer bond than sp2. Looking at sp2 energy levels, from an energetic perspective, they are lower in energy than sp3 so they are more stable. A p orbital is less stable than s orbital, so p orbital is a higher energy orbital which means the bond is weaker.