I don't believe chemical elements would cease to exist above Z=137—they just get progressively stranger, electronic effects get more relativistic. It is not a h

I don't believe chemical elements would cease to exist above Z=137—they just get progressively stranger, electronic effects get more relativistic. It is not a hard limit. (It's not as if the speed of electrons would *exceed* c above Z=137; it just approaches it asymptotically. The 1/137 factor comes from the non-relativistic approximation (simply, the plain Bohr model [0])). [0] https://en.wikipedia.org/wiki/Bohr_model#Derivation https://en.wikipedia.org/wiki/Bohr_model#Derivation