Human & Veterinary Respiratory Physilogy_DR.E.Muralinath_Associate Professor....
electronic configuration.pptx ghjjkgjhjhklh
1. The Electron Configuration of an Atom
Electron Configuration
Electron Configuration is a systematic arrangement of
electrons in the main energy levels and sublevels or
subshells of an atom.
The Pauli Exclusion Principle, was formulated by an Austrian
physicist named Wolfgang Pauli limits the number of electrons
in an orbital to not more than two, and this pair of electrons
must be spinning in opposite direction,
The Hund’s Rule or Principle of Maximum Multiplicity directs
that for a given sublevel, each orbital must be occupied with
a parallel single electron before pairing of electrons in any
orbital of that sublevel can occur.
Aufbau Principle, from the German Aufbau (building-up
principle) shows us build up an atoms electronic
configuration by principle electrons into orbitals of every
increasing energy. For example, the orbitals in the n=1
energy level will fill up before the orbitals in the n=2
