Tag Archives: Per Teodor Cleve

Thulium, Tm, Atomic number 69

General Thulium is a chemical element with the element symbol Tm and atomic number 69. In the periodic table it is in the group of lanthanides and is thus also one of the rare earth metals. Thulium (Named after Thule, the mythical island … Continue reading

Posted in Rare earth | Tagged , , , , , , , , | Leave a comment

Holmium, I, Atomic number 67

General Holmium is a chemical element with the element symbol Ho and atomic number 67. In the periodic table it is in the group of lanthanides and is thus also one of the rare earth metals. 1878 discovered the Swiss chemist Marc Delafontaine … Continue reading

Posted in Rare earth | Tagged , , , , , , , , , , , | Leave a comment