Periodic Table of Elements

03/24/07

Po

Polonium

Atomic Number

84

Atomic Symbol

Po

	Name	Polonium
	Meaning	Named for Poland

Group

Metalloids

Atomic Weight

209

Density, g/cubic cm at STP

9.32

Melting Point, °C

254

Boiling Point, °C, 1 atm

962

Naturally Occurring Isotopes

Po-209, Po-210

Discoverer

Curie

Year

1898

Ionization Energy, eV

8.414

Configuration

[Xe] 4f14 5d10 6s2 6p4

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