No one but Lehrer could do a credible job of fitting any new elements into the song, and since the words suggest that others will be discovered, the original version is best left alone. If nothing else it is a historic point in time for the world of science.

My kids have actually learned that song so well they can sing along with Lehrer and pronouce it up to speed. I wouldn't attempt it! Best I can do is listen and get the last element or two in several lines of the song.

SRS