Thulium
From Conservapedia
Thulium | |
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Properties | |
Atomic symbol | Tm |
Atomic number | 69 |
Classification | Metallic |
Atomic mass | 168.93421 amu |
Other Information | |
Date of discovery | 1879 |
Name of discoverer | Per Teodor Cleve |
Name origin | 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 from | Found chiefly in monazite and bastnasite ores |
Thulium is the rarest of the rare earth metals.
Periodic Table of the Elements | ||||||||||||||||||||||||
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
*Lanthanides | 69
Tm 168.93 |
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**Actinides | ||||||||||||||||||||||||