seventy and seven stable isotopes
Ytterbium has three allotropes
resourcefull and I'm relevant
easy to purify because I am divalent
highly toxic and terotegenic
you'll need to call a paramedic
I don't feel nothing when I feel
I make a stronger stainless steel

Ytterbium after Ytterby
made purely in 1953
charles galissard and george Urbain
brought Ytterbium to our domain

Ytterbium has twelve metastates
One seventy three atomic weight
ion and solid state lasers
room temperature a solid phaser
when you make up some stuff and it needs a name
the swedes and swiss they know the game
if its silvery white or rusty brown
name that goo after the nearest town

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