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Periodic Table of Elements

 

02/05/09

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Periodic Table


Mn

Manganese

Atomic Number 25

Atomic Symbol Mn

Name Manganese
  Meaning Named for the Latin word 'magnes' meaning 'magnet'; a manganese ore is magnetic

Group Transition metals

Atomic Weight 54.938049

Density, g/cubic cm at STP  7.44

Melting Point, °C 1246

Boiling Point, °C, 1 atm 2041

Naturally Occurring Isotopes Mn-55

Discoverer Gahn, Scheele

Year 1774

Ionization Energy, eV 7.434

Configuration [Ar]3d5 4s2

Description Lustrous grey

   

Information
Manganese is another transition metal that is alloyed to form special steels. There was once a story about how Manganese nodules (which are found in the deep ocean and contain about 30% manganese) would be an incredibly useful resource, but this actually turned out to be a cover story to hide an attempt to salvage parts from a sunken Russian submarine. Be careful not to confuse Manganese with Magnesium!

Joseph's Element Collection
Joseph bought this vial of Managnese electrowinning broken plate from the Red, Blue, and Green company.

References:

Holden, Norman E. (March 30, 2004). "History of the origin of the chemical elements and their discoverers." National Nuclear Data Center. Retrieved October 7, 2005 from http://www.nndc.bnl.gov/content/elements.html

"List of elements by boiling point." (September 22, 2005). Wikipedia. Retrieved October 9, 2005 from http://en.wikipedia.org/wiki/List_of_elements_by_boiling_point

"List of elements by density." (September 22, 2005). Wikipedia. Retrieved October 9, 2005 from http://en.wikipedia.org/wiki/List_of_elements_by_density

"List of elements by melting point." (September 22, 2005). Wikipedia. Retrieved October 9, 2005 from http://en.wikipedia.org/wiki/List_of_elements_by_melting_point

"NIST chemistry webBook." (2005). National Institute of Standards and Technology. Retrieved October 6, 2005 from http://webbook.nist.gov/chemistry/

Zucker, M.A.; Kishore, A. R.; Sukumar, R.; and Dragoset, R. A. (July 2005). "Elemental data index."  National Institute of Standards and Technology. Retrieved October 7, 2005 from http://physics.nist.gov/PhysRefData/Elements/cover.html

 


 

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