|
|
Article: Promethium
- Article from:
- Chemistry: Foundations and Applications
- Author:
CopyrightCOPYRIGHT 2004 The Gale Group, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Promethium
melting point:
1,100
°
C
boiling point:
3,000
°
C
density:
7.22 g/cm
3
most common ions:
Pm
3+
The existence of promethium was first theorized in 1902 by Bohuslav Brauner, who predicted that an element between neodymium and samarium was missing from the periodic table. Because only minuscule amounts of promethium are naturally present in Earth's crust, full confirmation of this prediction was not made until 1945. Working at the Oak Ridge National Laboratory in Oak Ridge, Tennessee, Jacob Marinsky, Lawrence Glendenin, and Charles Coryell produced promethium by the
nuclear fission
of uranium and by neutron irradiation of neodymium, chemically identifying the new ...
Related newspaper, magazine, and journal articles:
|
|
Article: Oak Ridge, Tenn., Incinerator to Receive Toxic ...
Knight Ridder/Tribune Business News;
November 15, 2002 ;
700+ words
... ... Tribune Business News Nov. 15--OAK RIDGE, Tenn.--The state has given the ... the green light to ship toxic waste to Oak Ridge from around the nation over the next ... burned starting early next year at the Oak Ridge incinerator. The federal facility currently ...
|
|