\label{Authoring_ReactionResponse}\index{reactionresponse}

\textbf{reactionresponse} queries for a chemical reaction.
An internal \textbf{textline} element is necessary for the student's response to go in.
\\ \\
Possible attributes are:
\begin{itemize}
  \item \textbf{answer}: see \textbf{chem} at \ref{Authoring_Output_Tags} for the chemical reaction syntax
  \item \textbf{initial}: initial reaction displayed to students
\end{itemize}

Hints can be specified with \textbf{reactionhint}.