Changes

{{Element | name=Thulium | symbol=Tm | anumber=69 | amass=168.93421 amu | state=Solid | class=Metallic | cstructure=Hexagonal| color=Silver colored, tarnishes in air and reacts with water. | date=1879 | discname=Per Teodor Cleve  | origname=From Thule, the ancient name of Scandinavia. | uses=Radioactive thulium is used to power portable x-ray machines, eliminating the need for electrical equipment. | obtained=Found chiefly in [[monazite]] and [[bastnasite]] ores }}

{{Element | name=Thulium | symbol=Tm | anumber=69 | amass=168.93421 amu | state=Solid | class=Metallic | cstructure=Hexagonal| color=Silver colored, tarnishes in air and reacts with water. | date=1879 | discname=Per Teodor Cleve  | origname=From Thule, the ancient name of Scandinavia. | uses=Radioactive thulium is used to power portable x-ray machines, eliminating the need for electrical equipment. | obtained=Found chiefly in [[monazite]] and [[bastnasite]] ores }}

'''Thulium''' is the rarest of the rare earth metals.

'''Thulium''' is the rarest of the [[rare earth metals]].

[[Category:Elements]]

[[Category:Elements]]

[[Category:Metals]]

[[Category:Metals]]

{{Periodic table}}

{{Periodic table}}