Thulium

1879

Thulium

The book of science

Tom Sharp

UppsalaPer Teodor Cleve elements

Thulium

Atomic number 69

Trying

Thulium is the second rarest element, after promethium, in the lanthanide group of the periodic table. Sitting at the table, one would never say, “Please pass the thulium.” By which I mean to say that most of us go through life without using “thulium” in a sentence.

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