Calculating the Spectroscopic Terms of an AtomGiven the number of electrons in the outermost shell of an atom, it is possible to find all the possible configurations of these electrons, and from this calculate all the different spectroscopic terms of the atom.
For further reading on electron configurations, see wikipedia
The following web site calculates all the possible configurations of electrons in an atom, given the number of electrons in the outermost shell and their total angular momentum.
Note: it is assumed that all of the shells except the outermost shell are completely full.
To use the website, simply insert the total angular momentum of the atom (as a letter representing the angular momentum - see table below) and the number of electrons in the outermost shell and click "Submit"