What is Ytterby?
'''Ytterby''' is a [[village]] on the Swedish island of [[Resarö]], in Vaxholm Municipality in the [[Stockholm]] archipalego. Ytterby is known for being the source with the most elementa discovered in the world, namely [[yttrium]] (Y,) [[terbium]] (Tb,) [[erbium]] (Er,) and [[ytterbium]] (Yb.) {{Europe-stub}} [[Category:Settlements in Sweden]]