# FHSST Physics/Atom/Electron Configuration

The Atom The Free High School Science Texts: A Textbook for High School Students Studying Physics Main Page - << Previous Chapter (Electronics) - Next Chapter (Modern Physics) >> Models - Structure - Isotopes - Energy Quantization - Periodicity of Ionization Energy - Successive Ionization Energies - Bohr Orbits - Heisenberg Uncertainty Principle - Pauli Exclusion Principle - Ionization Energy - Electron Configuration - Valency

# Electron configurationEdit

i.e. filling the orbitals starting from 1s..... Aufbau principle unpaired and paired electrons Hund's rule: 1 e- in each orbital before pairing in p orbitals shorthand: ${\displaystyle 1s^{2}\ 2s^{2}\ 2p^{2}}$  etc.