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1
Description
Thulium's atomic number is 69 and its symbol is Tm. It is an easily workable metal with a bright silvery-gray luster. It is fairly soft and slowly tarnishes in air. Despite its high price and rarity, thulium is used as the radiation source ...
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Thulium
Another great cube from Engineered Labs. I have been buying from them for about two years now and will continue to do so. Amazing customer service!