Well...
You know how in science, the rule is 'Rather than get credit for doing it the first time, you get credit for doing it the second/third/fourth time only better'?
Well, in the case of the periodic table of elements, the scientist credited with it's 'creation' was the one who altered older versions to make more space for additional, yet to be discovered elements.
Ugh..
basically, what I meant was 'you haven't left room for yet to be discovered members'
:<