Periodic Table of Elements

02/05/09

Co

Cobalt

Atomic Number

27

Atomic Symbol

Co

	Name	Cobalt
	Meaning	Named for the German word 'kobold' meaning 'evil spirit' because it caused problems in mining

Group

Transition metals

Atomic Weight

58.9332

Density, g/cubic cm at STP

8.86

Melting Point, °C

1495

Boiling Point, °C, 1 atm

2877

Naturally Occurring Isotopes

Co-27

Discoverer

Brandt

Year

1735

Ionization Energy, eV

7.881

Configuration

[Ar] 3d7 4s2

Description

Lustrous grey

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