\begin{table}%t4
    %\centering
\par
      \caption{\label{tab:abund}The abundances of chemical elements for the 
        primary and \mbox{secondary} stars.}
        \begin{tabular}{lcllcc}
          \hline\hline
          Atomic& No. lines used & Primary & Secondary & Sun\\
          No.& Prim./Sec.\\ 
          \hline
          6 & 4/2  &8.45 (0.15)&  8.78 (0.28)&8.39\\
          8 & 1/1  &8.89 (0.13)&  8.82 (0.13)&8.66\\
          11 & 1/--  &6.21 (0.08)&            &6.17\\
          12&2/2 &7.35 (0.16)&  8.37 (0.30)&7.53\\
          13&1/-- &6.17 (0.38) &  &6.37 \\
          14&2/2 &7.81 (0.21)&  7.91 (0.12)&7.51\\
          16&1/-- &6.67 (0.21)&             &7.14\\
          20&4/4 &6.28 (0.18)&  6.92 (0.23)&6.31\\
          21&2/2 &3.12 (0.10)&  3.89 (0.26)&3.17\\
          22&9/9 &4.90 (0.18)&  5.38 (0.21)&4.90\\
     %     23&V &100. (0.00)&  5.10 (0.64)&4.00\\
          24&4/5 &5.81 (0.14)&  6.31 (0.13)&5.64\\
      %    25&Mn &5.70 (0.00)&  6.48 (0.65)&5.39\\
          26&19/20 &7.17 (0.21)&  7.84 (0.19)&7.45\\
          27&1/-- &5.57 (0.02)&  &4.92\\
          28&6/9 &6.13 (0.18)&  6.89 (0.22)&6.23\\
%          29&/  &3.71 (0.34)&             &4.21\\
          39&2/2 &2.72 (0.20)&  2.78 (0.17)&2.21\\
          40&--/1 &           &  3.20 (0.08)&2.58\\     
          \hline
\par
        \end{tabular}
    \end{table}