October 2015 UTC What do you know a consensus of 3 1 has become unacceptable But I think you re missing the point We know the gap is made ambiguous by Sc Y We know it results in an inconsistency with the Sc Y Lu Lr 32 column periodic table but the main argument for Sc Y is that it emphasizes the chemical similarities of the lanthanides and actinides as well as Sc and Y Then both the 18 and 32 column periodic tables unite similar elements as much as possible e g Yb is next to Lu in Sc Y Lu Lr 32 column but not in Sc Y Lu Lr 18 column whereas it is in Sc Y 18 column given the universally accepted constraint that one element takes up exactly one cell 05 36 9