class1

Chapter 1

organic vs inorganic

  • oranic molecules Contain carbon, essential to life
  • It is possible to convert some inorganic molecules to organic molecules
  • Ammonium cyanate -> urea
  • not all inorganic molecules contain carbon, but all organic molecules contain carbon

Structure of an atom (carbon)

  • protons and neutrons are surrounded by electron field
  • "orbitals" is a simple way of defining energy levels of groups of electrons
  • P orbital has higher energy compared to S orbital
  • \(1s^22s^22p^2\)
  • carbon has 4 valence electrons with a maximum of 8
  • \(1s^22s^22p^2_x2p^2_y2p^2_z\) is the maximum configuration
  • Aufbau principle: an electron goes into the lowest energy orbital
  • pauli exclusion principle: 2 electrons per orbital maximum (spin up, spin down)
  • Hund's rule: 2 or more orbitals of the same energy(degenerate), electrons will go into different orbitals