In Elementary Transadditions (February 2006), Darryl Francis lists the shortest transadditions he could find of 122 element names. These are a mixture of his own, recent, words and words documented as elementary transadditions in previous articles, including Ed Wolpow's Chemical Improvements (May 1995).
"More Elementary Improvements,"
Word Ways: Vol. 39
, Article 27.
Available at: http://digitalcommons.butler.edu/wordways/vol39/iss2/27