Thulium
chemical element with the atomic number of 69
Thulium (pronounced /ˈθjuːliəm/) is a chemical element that has the symbol Tm and atomic number 69. It is a lanthanide element.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Thulium_sublimed_dendritic_and_1cm3_cube.jpg/220px-Thulium_sublimed_dendritic_and_1cm3_cube.jpg)
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Thulium (pronounced /ˈθjuːliəm/) is a chemical element that has the symbol Tm and atomic number 69. It is a lanthanide element.