Periodic Table of Elements

06/14/07

Cd

Cadmium

Atomic Number

48

Atomic Symbol

Cd

	Name	Cadmium
	Meaning	Name comes from the Greek name of an ore associated with cadmium

Group

Transition metals

Atomic weight

112.411

Density, g/cubic cm at STP

8.69

Melting Point, °C

321.18

Boiling Point, °C, 1 atm

767

Naturally Occurring Isotopes

Cd-106, -108, -110, -111, -112, -113, -114, -116

Discoverer

Stromeyer

Year

1817

Ionization Energy, eV

8.9938

Configuration

[Kr] 4d10 5s2

Description

Lustrous, silver-grey

Information Cadmium was used for electroplating, and more commonly in Nickel-Cadmium batteries. These uses became discontinued when the health risks were appreciated, as Cadmium is quite toxic. Lithium-ion batteries are both longer lasting and less harmful to the environment than Ni-cads. 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