I have the following code:
\begin{table}[H]
\begin{center}
\caption{Quarks and leptons of the Standard Model.}
\label{TablaQuarks}
\begin{tabu}{|m{2cm}|m{2cm}|m{4cm}|[2pt]} \hline
\multicolumn{3}{|c|[2pt]}{Quarks} \\ \hline
Flavour & Charge & Mass \\ \hline
u & 2/3 $e$ & 2.3$_{-0.5}^{+0.7}$ MeV/c$^2$ \\[1.0ex]
d & -1/3 $e$ & 4.8$_{-0.3}^{+0.7}$ MeV/c$^2$ \\[1.0ex]\hline
c & 2/3 $e$ & 1.275 $\pm$ 0.025 GeV/c$^2$ \\
s & -1/3 $e$ & 95 $\pm$ 5 MeV/c$^2$ \\ \hline
t & 2/3 $e$ & 173.5 $\pm$ 0.6 GeV/c$^2$ \\
b & - 1/3 $e$ & 4.18 $\pm$ 0.03 GeV/c$^2$ \\ \hline
\end{tabu}
\end{center}
\end{table}
The problem is that I cannot center (vertically) the text in the last column, it always remains at the top. Moreover the first two that are vertically aligned cannot be centered horizontally.
In order to use the previous code you need the tabu
and array
packages.