\begin{table}%t3
 \caption{\label{tab:ab}Abundances of 17 elements in EK~Eri.}
%\centerline
{\begin{tabular}{llrllr}\hline\hline
El. & \multicolumn{1}{c}{$A$}  & $N$ & El. & \multicolumn{1}{c}{$A$}  & $N$ \\ 
\hline
  {C  \sc   i} & $ -0.24          $  &   2  &   {V  \sc   i} & $ +0.08  \pm0.04 $  &  15  \\  
  {Na \sc   i} & $ +0.19  \pm0.04 $  &   3  &   {Cr \sc   i} & $ +0.01  \pm0.04 $  &  20  \\ 
  {Mg \sc   i} & $ -0.02          $  &   2  &   {Cr \sc  ii} & $ -0.05  \pm0.04 $  &   4  \\ 
  {Al \sc   i} & $ +0.09          $  &   2  &   {Fe \sc   i} & $ +0.02  \pm0.04 $  & 300  \\ 
  {Si \sc   i} & $ +0.02  \pm0.04 $  &  31  &   {Fe \sc  ii} & $ +0.01  \pm0.04 $  &  15  \\ 
  {S  \sc   i} & $ +0.04          $  &   1  &   {Ni \sc   i} & $ -0.01  \pm0.04 $  &  63  \\ 
  {Ca \sc   i} & $ +0.11  \pm0.04 $  &   8  &   {Sr \sc   i} & $ +0.10          $  &   1  \\ 
  {Sc \sc   i} & $ +0.03  \pm0.05 $  &   5  &   {Y  \sc  ii} & $ -0.01  \pm0.04 $  &   5  \\ 
  {Sc \sc  ii} & $ -0.01  \pm0.04 $  &   4  &   {Zr \sc   i} & $ +0.00  \pm0.07 $  &   3  \\ 
  {Ti \sc   i} & $ +0.05  \pm0.04 $  &  50  &   {Pr \sc  ii} & $ -0.07          $  &   1  \\ 
  {Ti \sc  ii} & $ -0.03  \pm0.04 $  &  11  &                &                     &      \\
\hline\end{tabular}}
\par
\tablefoot{The columns contain the element name and ionization stage,
the mean abundance relative to the Sun, and the number of spectral lines used.}
\end{table}