Posted: Sun Oct 28, 2018 1:12 pm
I'm having trouble figuring out the electron configurations of the f-block elements. For example, the electron configuration for thorium is Rn6d^27s^2, but the atom is in the f-block of the periodic table. Why are the orbitals only d and s but not f? Is there a separate rule regarding the f-block elements of the table? Does it have something to do with their electron shells?