Assertion: technetium | /r/HasProperty | tc
Facets:
Source sentences:
text: Technetium (Tc), chemical element, synthetic radioactive metal of Group 7 (VIIb) of the periodic table, the first element to be artificially produced.
text: Technetium (Tc) is a chemical element in the periodic table with atomic number 43.
text: Technetium (Tc) is the lowest molecular weight element that is exclusively radioactive.
text: They are manganese (Mn), technetium (Tc), rhenium (Re), and bohrium (Bh).
text: Technetium (Tc) has atomic number, Z= 43, which means that all of its atoms have 43 protons in their nuclei.
text: Technetium (Tc) is element number 43 in the periodic table.
text: The existence of spectral lines from the period 5 element Technetium (Tc) is also expected as a result of the s-process neutron capture, but a substantial fraction of S stars show no sign of Tc.
text: The s-process elements include zirconium (Zr), yttrium (Y), lanthanum (La), technetium (Tc), barium (Ba), and strontium (Sr), which form the characteristic S class spectrum with ZrO, YO, and LaO bands, as well as Tc, Sr, and Ba lines.
text: Because technetium (Tc) is an unstable radioactive element decaying with a half-life of 2.1 × 10years, it must have been produced in the burning shell of the star in which it is observed.
text: Nathalie Wall, assistant professor of chemistry, and Larissa Gribat, chemistry doctoral candidate, are investigating ways to contain technetium (Tc), a radioactive element produced during the burnup of uranium fuel.