What is unique about terbium?
Terbium is a soft, malleable, ductile, silver-gray metal member of the lanthanide group of the periodic table. It is reasonably stable in air, but it is slowly oxidised and it reacts with cold water. Terbium is rare and expensive, so it has few commercial uses.
What is terbium known for?
A soft, silvery metal. Terbium is used to dope calcium fluoride, calcium tungstate and strontium molybdate, all used in solid-state devices. It is also used in low-energy lightbulbs and mercury lamps. An alloy of terbium, dysprosium and iron lengthens and shortens in a magnetic field.
What are 5 interesting facts about Thulium?
Facts About Thulium
- Atomic Number: 69 Atomic Symbol: Tm Atomic Weight: 168.93421 Melting Point: 2,813 F (1,545 C) Boiling Point: 3,542 F (1,950 C)
- Word origin: Thulium is named for Thule, the earliest name for Scandinavia.
- Discovery: This rare earth was discovered by Sweedish chemist Per Teodor Cleve in 1879.
What is the element name of LR?
Lawrencium
Lawrencium is a chemical element with symbol Lr and atomic number 103. Classified as an actinide, Lawrencium is a solid at room temperature.
Is terbium a rare earth metal?
Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogengas.
What has an atomic number of 69?
Sitting towards the end of the lanthanides, the floating strip of elements on the periodic table that squeezes between barium and lutetium, thulium has atomic number 69.
What are the facts and facts about terbium?
Facts About Terbium. Atomic Number: 65 Atomic Symbol: Tb Atomic Weight: 158.92535. Melting Point: 2,473 F (1,356 C) Boiling Point: 5,846 F (3,230 C)
How is terbium similar to other lanthanide metals?
Terbium is part of the Lanthanide metals, a group of elements with similar characteristics that can be found in the first row of the inner transition metals. They are similar in the fact that they are metals, have high boiling points and melting points, tarnish quickly in moist air, react with oxygen, and have magnetic properties.
Is the metal terbium malleable with a knife?
Terbium is a member of the lanthanide or rare earth group of elements. [See Periodic Table of the Elements] The silver-gray metal, which is relatively stable in air, is malleable and can be cut with a knife. Two crystal modifications, with a transformation temperature of 2,352 F (1,289 C), are known.
Why is terbium used in X-ray machine?
Although there is a small chance for humans to be exposed to radiation from x-rays, it is possible to develop cancerous cells depending on the situation. Terbium is used within an x-ray machine to allow the exposure time to be much shorter while giving the same quality image that is necessary for diagnosis.