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thulium
Definition
Thulium is a chemical element with the symbol Tm and atomic number 69. It is a rare-earth element, meaning it is not found in large quantities in nature.
Thulium is a silvery-white metal that is soft and ductile. It is also a good conductor of heat and electricity.
Thulium is not found in nature in its pure form. It is found in combination with other elements, such as monazite and xenotime.
Thulium is used in a variety of applications, including:
- Lasers: Thulium is used in lasers because it can emit light at a variety of wavelengths.
- Solid-state lighting: Thulium is used in solid-state lighting because it can emit light at a variety of wavelengths.
- Medical imaging: Thulium is used in medical imaging because it can emit light at a variety of wavelengths.
How can the word be used?
Thulium is a rare-earth element that is found in very small quantities in nature.
Different forms of the word
Noun:
a chemical element with the symbol Tm and atomic number 69. It is a soft, silvery-metallic element that is found in nature in combination with other elements.
Adjective:
relating to or containing thulium.
Etymology
The word "thulium" comes from the Greek word "Thule", which is the name of an ancient place that was thought to be located in the far north.
The first recorded use of the word "thulium" in English was in 1879.
The word "thulium" is a Modern Latin word, which means that it was created by scientists. It is derived from the Greek word "Thule".
Question
What is thulium?