Hi list,

I’m writing nuclear reactions. When add prescripts to atomic symbols with two letters, (Be, Sr, Xe, etc.) the prescripts split the atoms! (See output below.) 

\starttext
Text:   \lohi[left]{4}{10}Be.
Reaction:
\startformula
  {\rm U}^^{235}__{92} + n \rightarrow {\rm Sr}^^{94}__{38} + {\rm Xe}^^{140}__{54} + 2n
\stopformula 
\stoptext

I looked at \chemical and \molecule, but could not find a way to make isotopes with those. Any ideas?

Gavin