Periodic Table of Elements

02/05/09

Pt

Platinum

Atomic Number

78

Atomic Symbol

Pt

	Name	Platinum
	Meaning	Name is from the Spanish word for silver, 'platina'

Group

Transition metals

Atomic Weight

195.078

Density, g/cubic cm at STP

21.46

Melting Point, °C

1772

Boiling Point, °C, 1 atm

3827

Naturally occurring isotopes

Pt-190, -192, -194, -195, -196, -198

Discoverer

Ulloa/Wood

Year

1735/1741

Ionization Energy, eV

8.9588

Electron configuration

[Xe] 4f14 5d9 6s

Description

Silvery-white

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