\documentclass{ppex}
\nonstopmode
\usepackage {m-chemic}
\pagestyle{empty}

\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {m-chemic}
\setupchemical[axis=off,border=on,scale=small,size=small]
\begin{tabular}{cccc}
\startchemical
  \chemical[ONE,SB][1,2,3,4,5,6,7,8]
\stopchemical
&
\startchemical
  \chemical[THREE,B,R,RZ][1,2,3]
\stopchemical
&
\startchemical
  \chemical[FOUR,B,R,RZ][1,2,3,4,6]
\stopchemical
&
\startchemical
  \chemical[FIVE,B,R,RZ][1,2,3,4,5]
\stopchemical
\\
{ONE} &
{THREE} &
{FOUR} &
{FIVE} \\[5pt]
\startchemical
  \chemical[SIX,B,R,RZ][1,2,3,4,5,6]
\stopchemical
&
\startchemical
  \chemical[CARBON,CB][1,2,3,4]
\stopchemical
&
\startchemical
  \chemical[NEWMAN,CB][1,2,3,4,5,6]
\stopchemical
&
\startchemical
  \chemical[EQUILIBRIUM][1,2]
\stopchemical
\\
{SIX} &
{CARBON} &
{NEWMAN} &
{EQUILIBRIUM}
\end{tabular}
\end{document}