CHEM 110 Lecture Notes - Electronic Band Structure, Metal, Valence Electron

• School: McGill University
• Department: Chemistry
• Course: CHEM 110
• Professor: Ariel Fenster

Document Summary

40 multiple choice questions 5 questions from sanctuary and 35 new material. Few valence electrons and many empty orbitals. Metals in crystals surrounded by many neighboring atoms, regular array of the nuclei. Model; electrons move freely among array of positive charges. Since electrons are not localized within a bond of a particular energy, they can absorb and emit light of all frequencies. Since electrons are not localized within a bond, they are extremely mobile (they can hope and move) Electricity comes in one side and hopes out the other (electron in, electron out) Decreases, at higher temperatures, the increased vibration of the positive ions interferes with the motion of the electrons. By interfering with the electrons, the conductivity will decrease. Electrons can move easily, therefore electrons in hot regions migrate to cooler regions and transfer their energy to the crystal lattice. Relationship between thermal and electrical conductivity: strong relationship those that are good thermal conductors are also good electrical conductors.