Covered syllabus.

Review of Chem 105

Review of periodic table; top 3 rows & Br & I

• Structure of table is based on structure of atom
• nucleus
  • proton, +1 charge
  • neutron, 0 charge
• e-, -1 charge, very fast moving
  • quantum mechanics keep the electron from crashing into nucleus
  • energies of electrons can be calculated; 0,1, or 2 electrons per orbital
    • 1s orbital
    • 2s
    • 2p
    • 3s
    • 3p

Carbon

• free carbon atom has 1s²2s²2p²
• Valence shell (outermost)
• if bond to 4 H atom to make CH4
  • 1s,2sp³ hybridized carbon.
  • tetrahedron geometry. It