How high of atomic number to get g-block electrons?

[swampwiz]

I have just read that Element 118, Og, has been discovered, which it would seem will allow for a nice, neat Periodic Table again, last seen when Lw (103) was added (although that should be in Group III, but whatever, it was a nice, neat table). It seems to me that once Element 121 gets discovered, there will finally be an atom that has a g-block electron. Is this accurate? Will the Periodic Table have to start a new g-block section in a similar way that the rare Earth's represented the f-block?

 

[PeterDonis]

It seems to me that once Element 121 gets discovered, there will finally be an atom that has a g-block electron. Is this accurate?

We don't know. It's a natural extrapolation, but there appear to be plenty of complexities that could spoil it. This Wikipedia article provides a decent overview:

https://en.wikipedia.org/wiki/Extended_periodic_table

 

[DrDu]

I would expect the current calculations on the first g block elements to be quite accurate.