There are stereotypes that have been out there for a long time that tell girls that their main asset, the main thing that they are valued for, is their appearance and also that it's to the exclusion of anything else. ↗
Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs). ↗