Transposition of the chemical element names is not elementary -- often, they are extraordinarly difficult to find. Word Ways articles by Darryl Francis in November 1977 and Jeremy Morse and Edward Wolpow in February 1978 tacitly recognize the obstacles by allowing transadditions of element names instead: rearrangements after one or more letters have been added.
Borgmann, Dmitri A.
Word Ways: Vol. 11
, Article 4.
Available at: https://digitalcommons.butler.edu/wordways/vol11/iss3/4