Assertion: technetium | /r/HasProperty | element
Facets:
value: in the first 82
type: TEMPORAL
value: with no stable isotopes
type: OTHER
Source sentences:
text: Technetium is an element and therefore does not contain any compounds!
text: Technetium is one of two elements with Z < 83 with no stable isotopes; all of technetium's isotopes are radioactive.
text: Technetium is one of three elements in the first 82 that have no stable isotopes (the other such elements are promethium and tungsten (although because the half-life of tungsten is so long (2.09E19 y), tungsten is usually classed as being stable).
text: Technetium is one of the two elements in the first 82
text: Technetium is an element and therefore does not contain any compounds!
text: Technetium is an element and therefore does not contain any compounds!
text: Still, Lawrence’s cyclotrons allowed element hunters to take trillions of shots, and by 1937 one of his devices had created technetium (element