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Shannon information entropies in position and momentum spaces and their sumare calculated as functions of Z (Z=2-54) in atoms. Roothaan-Hartree-Fockelectron wave functions are used. The universal property S=a+b lnZ is verified.In addition, we calculate the Kullback-Leibler relative entropy, theJensen-Shannon divergence, Onicescu's information energy and a complexitymeasure recently proposed. Shell effects at closed shells atoms are observed.The complexity measure shows local minima at the closed shells atoms indicatingthat for the above atoms complexity decreases with respect to neighboringatoms. It is seen that complexity fluctuates around an average value,indicating that the atom cannot grow in complexity as Z increases. Onicescu'sinformation energy is correlated with the ionization potential. Kullbackdistance and Jensen-Shannon distance are employed to compareRoothaan-Hartree-Fock density distributions with other densities of previousworks.Comment: Major revision, accepted for publication in the Journal of Chemical  Physic

Information entropy, information distances, and complexity in atoms