Electron Configurations ? Chemical Periodicity (Ch 8)

• Electron spin & Pauli exclusion principle

• configurations
  • spectroscopic, orbital box notation

• Hund’s rule - electron filling rules

• configurations of ATOMS:
  • the basis for chemical valence

• configurations and properties of IONS

• periodic trends in :
  • size
  • ionization energies
  • electron affinities

Na + Cl ? NaCl

Mg + ?O2 ? MgO

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