Nalin Balan NUCL 200 Paper due 02/07/97 TECHNETIUM Atomic Number: 43 Atomic Symbol: Tc Atomic Weight: (97) Electron Configuration: -18-13-2 History, Properties and Uses: (Gr. technetos, artificial) Element 43 was predicted on the basis of the periodi c table, and was erroneously reported as having been discovered in 1925, at which time it was named masurium. The element was actually discovered by Perrier and Segre in Italy in 1937. It was found in a sample of molybdenum, which was bombarded …showed first 75 words of 430 total…

…showed last 75 words of 430 total…limited to closed systems, since technetium is radioative and must be con fined. 98Tc has a specific activity of 6.2 x 10^8 Bq/g. Activity of this level must n ot be allowed to spread. 99Tc is a contamination hazard and should be handled in a glove b ox. The metal is an excellent superconductor at 11K and below. Source: CRC Handbook of Chemistry and Physics, 1913-1995. David R. Lide, Editor in Chief. Author: C.R. Hammond