\begin{table}%t2
\caption{\label{lodders}\label{tab2}Elemental and molecular abundances in the protoplanetary disk.}
\small%\centerline
{
\begin{tabular}{lccc}
\hline
\hline
Species X 	&  X/H$_2$ & Species X 	&  X/H$_2$\\	
\noalign{\smallskip}
\hline
\noalign{\smallskip}
C			& $5.82 \times 10^{-4}$	&	CO$_2$  		& $7.01 \times 10^{-5}$		\\
N   			& $1.60 \times 10^{-4}$    	&	CH$_3$OH  	& $1.40 \times 10^{-5}$		\\ 
O			& $1.16 \times 10^{-3}$	&	CH$_4$  		& $7.01 \times 10^{-6}$		\\
S        		& $3.66 \times 10^{-5}$	&	NH$_3$   		& $5.33 \times 10^{-5}$		\\
P			& $6.88 \times 10^{-7}$	&	N$_2$		& $5.33 \times 10^{-5}$		\\
H$_2$O  		& $5.15 \times 10^{-4}$	&	H$_2$S    	& $1.83 \times 10^{-5}$		\\
CO      		& $4.91 \times 10^{-4}$	&	PH$_3$		& $6.88 \times 10^{-7}$		\\ 
\hline
\end{tabular}}
\smallskip
Elemental abundances derive from Lodders (\cite{Lodders2003}). Molecular abundances are determined from our nominal gas phase composition.
\end{table}