Element Properties atomic number 43 commonest isotope (99) melting point 2,172° C (3,942° F) boiling point 4,877° C (8,811° F) specific gravity 11.5 (20° C) oxidation states +4, +6, +7 electron config. [Kr]4d65s1The
一种掺杂锝—99的核燃料元件,将燃料芯块叠放入锆四合金包壳管中,用压紧弹簧压紧后,包壳管两端口由端塞密封固定构成,其特征是燃料芯块为锝—99与二氧化铀的混合物,其中锝—99的核子密度与锝—99,二氧化铀中铀—238的核子密度之和的比值为10%～90%. One dopant technetium-99 nuclear fuel elements, the fuel...
内容提示: Chemistry of Technetium 99m J. Steigman and P. Richards The detection of a number of impurities in ~mTc effluents from 99M0 generators is im- portant for proper use of the generator systems. Their identification is described in this review. Technetium in sulfur colloid is probably ...
Similarly the sulfur colloid of Tc-99m is cleaned by the spleen, thus making it possible to image the organ’s structure. Technetium also acts as a catalyst in specific reactions such as the dehydrogenation of isopropyl alcohol. References http://www.webelements.com/technetium/ http://www....
锝:合成的放射性金属化学元素,原子序数43,最稳定的同位素锝99,半衰期2×10 5年,化学符号Tc。过去曾称为 (masuriu-m) technetium词源英文解释 Greek technētós "artificial" (verbal adjective of technáomai, technâsthai "to make with skill, contrive cunningly," verbal derivative of téchnē "art, ski...
Atomic Volume(cc/mol):8.5 Specific Heat(@20°C J/g mol):0.243 Fusion Heat(kJ/mol):23.8 Evaporation Heat (kJ/mol):585 Pauling Negativity Number:1.9 First Ionizing Energy (kJ/mol):702.2 Oxidation States:7 Lattice Structure:Hexagonal
while hexagonal bulk technetium has the Tc-99-NMR spectrum split in 9 satellites.[24][25] Atomic technetium has characteristic emission lines at wavelengths of 363.3 nm, 403.1 nm, 426.2 nm, 429.7 nm, and 485.3 nm.[26] The unit cell parameters of the orthorhombic Tc metal were reported when...
Technetium is a silvery-gray radioactive metal with an appearance similar to that of platinum. It is commonly obtained as a gray powder.[18] The crystal structure of the pure metal is hexagonal close-packed. Atomic technetium has characteristic emission lines at these wavelengths of light: 363.3...
crystal structuresuperconductivityTechnetium-99 is one of the most abundant, long-lived radiotoxic isotopes in used nuclear fuel (UNF). As such, it is targeted in UNF separation strategies such as UREX+, for isolation and encapsulation in solid waste forms for storage in a nuclear repository. ...
Today, there are ~35 isotopes of Tc that are known with atomic masses (A) spanning fromA = 85 to 120. None of the isotopes of Tc are stable, making it the lightest inherently radioactive element on the periodic table6. On Earth,99gTc (t1/2 = 2.11 × 105 y) is...