"==Article renaming== 

 I moved this article here from methyl mercury in what I thought would be an uncontroversial move.  For what it's worth, I wasn't just taking part in some sort of Holy Quest to change the spacing; I was also here to clean the stub a bit.  It seems that the move has prompted rather more discussion than I expected, so here is my reasoning. 
 *Methylmercury is in line with IUPAC nomenclature standards.  (PDF.) 
 *Methylmercury is more often used on the WWW, based on its Google results: 
 **""Methylmercury"" 120,000 results. 
 **""Methyl mercury"" 64,500 results, and a prompt for Did you mean: ""methylmercury"". 
 *On PubMed, methylmercury draws 3273 hits, versus 775 for methyl mercury. 
 As far as I know, there's no US versus British English issue here, so I shouldn't be treading on those sensitive toes.  I changed the wikilinks in articles with methyl mercury because that's standard practice after renaming an article; I didn't use piped links because I didn't expect any controversy.  Frankly, I still don't see the harm in the change.  If someone feels this should go to RfC for further consultation, that's fine.   / "