  The "simple" measure of complexity of Shiner, Davison and Landsberg (SDL) and
the "statistical" one, according to Lopez-Ruiz, Mancini and Calbet (LMC), are
compared in atoms as functions of the atomic number Z. Shell effects i.e. local
minima at the closed shells atoms are observed, as well as certain qualitative
trends of SDL and LMC measueres of complexity. If we impose the condition that
SDL and LMC behave similarly as functions of Z, then we can conclude that
complexity increases with Z and for atoms the strength of disorder is zero and
order is four.
