Osmium element (Os) is in group 8 and period 6 of a periodic table. Osmium is in the d-block and it is classified as a transition element on the periodic table.
There is a lot more information related to osmium which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Osmium element (Information Table)
- Osmium element in Periodic table
- Facts about Osmium
- Properties of Osmium
- Uses of Osmium
Osmium Element (Information Table)
The important data related to osmium element is given in the table below.
|Appearance of osmium||Silvery-blue metallic appearance|
|Atomic number of osmium||76|
|Symbol of osmium||Os|
|Atomic mass of osmium||190.23 u|
|Protons, Neutrons & Electrons in osmium||Protons: 76, Neutrons: 114, Electrons: 76|
|State of osmium (at STP)||Solid|
|Group number of osmium in periodic table||8|
|Period number of osmium in periodic table||6|
|Block of osmium in periodic table||d-block|
|Category of osmium||Transition metal|
|Bohr model or Electrons per shell or Electrons arrangement in osmium||2, 8, 18, 32, 14, 2|
|Electron configuration of osmium||[Xe] 4f14 5d6 6s2|
|Orbital diagram of osmium|
|Electronegativity of osmium (on pauling scale)||2.2|
|Atomic radius of osmium (van der Waals radius)||216 picometers|
|Density of osmium||22.6 g/cm3|
|1st ionization energy of osmium||8.7 eV|
|Main isotope of osmium||192Os|
|Melting point of osmium||3306 K or 3033 °C or 5491 °F|
|Boiling point of osmium||5285 K or 5012 °C or 9054 °F|
|Crystal structure of osmium||Hexagonal Close Packing (HCP)|
|Discovery of osmium||By Smithson Tennant in 1844|
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Osmium element in Periodic table
The Osmium element (Os) has the atomic number 76 and is located in group 8 and period 6. Osmium is a metal and it is classified as a transition element.
Click on above elements in the periodic table to see their information.
Facts about osmium
Here are a few interesting facts about osmium element.
- Smithson Tennant discovered an osmium element in the year 1803.
- Osmium was given its name from the Greek word “osme”, meaning smell.
- Osmium is the most dense element on the periodic table, with a density of 22.6 g/cm3.
- The earth’s crust contains osmium in the concentration of 1.5 parts per billion by weight.
- Osmium is generally obtained as a byproduct while refining the nickel metal.
Properties of osmium
Here is a list of some physical properties and chemical properties of osmium.
Physical properties of osmium
- Osmium has a silvery-blue metallic appearance.
- The density of osmium is 22.6 g/cm3 and its atomic mass is 190.23 amu.
- The melting point and boiling point of osmium is 3306 K and 5285 K respectively.
- The crystal structure of osmium is HCP.
- Osmium has many isotopes and the most abundant isotope is 192Os.
Chemical properties of osmium
- The powdered form of osmium metal reacts with the atmospheric oxygen and forms osmium tetroxide.
- Osmium tetroxide has an unpleasant smell and it is a toxic compound of osmium.
- The oxidation states of osmium range from -2 to +8.
- The electron configuration of osmium is [Xe] 4f14 5d6 6s2 and it has incomplete d-orbitals.
Uses of osmium
Here are some uses of the osmium element.
- Osmium has the hardest density as compared to other elements on the periodic table. So it is alloyed with other metals to increase their hardness.
- The pacemakers also contain 10% osmium and 90% platinum.
- Osmium is also used in making electrical contacts.
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- Atomic Weight of Osmium | Commission on Isotopic Abundances and Atomic Weights. (n.d.). Atomic Weight of Osmium | Commission on Isotopic Abundances and Atomic Weights. https://ciaaw.org/osmium.htm
- Atomic Data for Osmium (Os). (n.d.). Atomic Data for Osmium (Os). https://physics.nist.gov/PhysRefData/Handbook/Tables/osmiumtable1.htm
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- Osmium – Wikipedia. (2018, May 10). Osmium – Wikipedia. https://en.wikipedia.org/wiki/Osmium
- Osmium – Element information, properties and uses | Periodic Table. (n.d.). Osmium – Element Information, Properties and Uses | Periodic Table. https://www.rsc.org/periodic-table/element/76/osmium
- P. (n.d.). Osmium | Os (Element) – PubChem. Osmium | Os (Element) – PubChem. https://pubchem.ncbi.nlm.nih.gov/element/Osmium
- It’s Elemental – The Element Osmium. (n.d.). It’s Elemental – the Element Osmium. https://education.jlab.org/itselemental/ele076.html
- C&EN: IT’S ELEMENTAL: THE PERIODIC TABLE – OSMIUM. (n.d.). C&EN: IT’S ELEMENTAL: THE PERIODIC TABLE – OSMIUM. http://pubsapp.acs.org/cen/80th/osmium.html?
- Bondi, A. (1964, March). van der Waals Volumes and Radii. The Journal of Physical Chemistry, 68(3), 441–451. https://doi.org/10.1021/j100785a001
- Holden, et al. (2018, December 1). IUPAC Periodic Table of the Elements and Isotopes (IPTEI) for the Education Community (IUPAC Technical Report). Pure and Applied Chemistry, 90(12), 1833–2092. https://doi.org/10.1515/pac-2015-0703
- Zhang, et al. (2011, January 11). Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks. Journal of Chemical & Engineering Data, 56(2), 328–337. https://doi.org/10.1021/je1011086
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