The Element Thulium

What is Thulium? Element Properties & Periodic Table Info

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What is the element Thulium as on the Periodic Table?

Periodic Table Group and Classification of the of the Thulium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Thulium classified as an element in the Lanthanide series as one of the "Rare Earth Elements" which can located in Group 3 elements of the Periodic Table and in the 6th and 7th periods. The Rare Earth Elements are divided into the Lanthanide and Actinide series. The elements in the Lanthanide series closely resemble lanthanum, and one another, in their chemical and physical properties. Their compounds are used as catalysts in the production of petroleum and synthetic products. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

 

Definition of the Thulium Element
A bright, silvery rare-earth element and can be cut by a knife. It slowly tarnishes in air, but is more resistant to oxidation than most rare-earth elements. It also has some corrosion resistance in dry air and good ductility. It is obtained commercially from monazite, having an x-ray emitting isotope that is used in small portable medical x-ray units. The Atomic Number of this element is 69 and the Element Symbol is Tm.

Origin / Meaning of the name Thulium
Named after Thule, an ancient Roman name for a mythical country in the far north, possibly Scandinavia.

Facts about the Discovery and History of the Thulium Element
Thulium was discovered by Per Teodor Cleve in Sweden in 1879

History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.

Occurrence of the Thulium Element
Found in small quantities in minerals with other rare earths - gadolinite, euxenite, xenotime

Abundances of the element in different environments
% in Universe 110-8%
% in Sun 210-8%
% in Meteorites 2.910-6%
% in Earth's Crust 0.000045%
% in Oceans 210-11%
% in Humans N/A

Associated Uses of Thulium
Lasers
Power for portable x-ray machines

Tm

Properties of the Thulium Element
Symbol of Element : Tm
Atomic Number: 69
Atomic Mass: 168.9342 amu
Melting Point: 1545.0 C - 1818.15 K
Boiling Point: 1727.0 C - 2000.15 K
Number of Protons/Electrons: 69
Number of Neutrons: 100
Crystal Structure: Hexagonal
Density @ 293 K: 9.321 g/cm3
Color: silverish

The Properties of the Thulium Element
Name of Element : Thulium
Symbol of Element : Tm
Atomic Number: 69
Atomic Mass: 168.9342 amu
Melting Point: 1545.0 C - 1818.15 K
Boiling Point: 1727.0 C - 2000.15 K
Number of Protons/Electrons: 69
Number of Neutrons: 100
Crystal Structure: Hexagonal
Density @ 293 K: 9.321 g/cm3
Color: silverish

Thulium as on the Periodic Table
Check out Thulium on the Periodic Table which arranges each chemical element according to its atomic number, as based on the Periodic Law, so that chemical elements with similar properties are in the same column. Our Periodic Table is simple to use - just click on the symbol for Thulium as on the Periodic Table for additional information and for an instant comparison of the Atomic Weight, Melting Point, Boiling Point and Mass - G/cc with any other element. An invaluable source of facts and information as a Chemistry reference guide.

What is Thulium - IUPAC and the Modern Standardised Periodic Table
The Standardised Periodic Table in use today was agreed by the International Union of Pure Applied Chemistry, IUPAC, in 1985 and now recognises more periods and elements than Dimitri  Mendeleev knew in his day in his day but still all fitting into his concept of  the "Periodic Table" in which Thulium is just one element that can be found.

Learn about what is Thulium with these fast facts...
These articles contain facts and information relating to Thulium and each of the other elements including the Periodic Symbol,  group, classification, properties and atomic number which is often referred to as the Periodic Table Number. Test your knowledge of chemistry and the Periodic Table by completing the Element Symbols and Atomic Numbers on our Blank Periodic Table. Chemistry students will also find a helpful section on Chemical Formulas.

What is the Element Thulium

The Elements are the building blocks of Modern Science & Chemistry


 

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