\documentclass[a4paper,12pt]{report}
\usepackage{german,echem}

\begin{document}

\begin{tabular}{llll}\hline
Element & Konfiguration & Element & Konfiguration\\
\hline
Lithium     & Li\vd{Li}       &
  Stickstoff & \vdd{N}\hdu{N}N\vdd{N} \\
%\addlinespace	% fuer booktabs.sty
Beryllium   & Be\vdd{Be}      &
  Sauerstoff & \vdd{O}\hddu{O}O\vdd{O} \\
%\addlinespace  % fuer booktabs.sty
Bor         & \vd{B}B\vdd{B}  &
  Fluor      & \vdd{F}\hddu{F}\hdl{F}F\vdd{F} \\
%\addlinespace  % fuer booktabs.sty
Kohlenstoff & \vdd{C}C\vdd{C} &
  Neon       & \vdd{Ne}\hddu{Ne}\hddl{Ne}Ne\vdd{Ne} \\
\hline
\end{tabular}

\end{document}