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Technetium
Beginning of paper
NUCL 200
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 n .... Middle of paper
.... of 61 days, is useful for tracer work, as it produces energetic
gamma rays. Technetium metal has been produced in kilogram quantities. The metal
was first prepared by passing hydrogen gas at 1100C over Tc2S7. It is now
conveniently prepared by the reduction of ammonium pertechnetate with hydrogen.
Techne tium is a silvery-gray metal that tarnishes slowly in moist air. Until
1960, techne tium was available only in small amounts and the pri ....
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Number of words: 407
Number of pages: 2 (approx. 250 words per double-spaced page)
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