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The Element Osmium


"The Atom"

Definition of the Osmium Element
A bluish-white, hard metallic element, found in small amounts in osmiridium, Nickel, and Platinum ores. It is used as a platinum hardener and in making pen points, phonograph needles, and instrument pivots. Osmium together with rhodium, ruthenium, palladium, iridium, and platinum form a group of elements referred to as the platinum group metals (PGM).

Osmium is unaffected by water and acids, but dissolves with molten alkalis. Osmium powder reacts slowly with the Oxygen of the air and gives off osmium tetroxide vapour. The Atomic Number of this element is 76 and the Element Symbol is Os.

The Properties of the Osmium Element
Symbol of Element : Os
Atomic Number: 76
Atomic Mass: 190.23 amu
Melting Point: 3045.0 C - 3318.15 K
Boiling Point: 5027.0 C - 5300.15 K
Number of Protons/Electrons: 76
Number of Neutrons: 114
Crystal Structure: Hexagonal 
Density @ 293 K: 22.4 g/cm3
Color: bluish-white

Origin / Meaning of the name Osmium
The name originates from the Greek word 'osme' meaning odor because of the sharp odor of the volatile oxide.

Periodic Table Group and Classification of the of the Osmium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Osmium is classified as a "Transition Metal" which are located in Groups 3 - 12 of the Periodic Table. Elements classified as Transition Metals are generally described as ductile, malleable, and able to conduct electricity and heat. Nearly 75% of all the elements in the Periodic Table are classified as metals which are detailed in the List of Metals.

Facts about the History and the Discovery of the Osmium Element
Osmium was discovered by Smithson Tenant in 1803 London, England

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 Osmium Element
Obtained from ores that contain platinum
Heaviest known element
Found in North and South America and Canada

Abundances of the element in different environments
% in Universe 310-7%
% in Sun 210-7%
% in Meteorites 0.000066%
% in Earth's Crust 1.810-7%
% in Oceans N/A
% in Humans N/A

Associated Uses of Osmium
Alloyed with other metals
Fountain pen points
Phonograph needles
Light filaments
Instrument pivots
Electrical contacts
Osmium tetroxide - tetraoxide

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Transition Metals
List of Metals
Periodic Table

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