Assertion: technetium | /r/HasProperty | unstable
Facets:
value: by sheer bad luck
type: CAUSE
value: highly
type: DEGREE
Source sentences:
text: By sheer bad luck, technetium is also highly unstable, and all of its isotopes are radioactive.
text: This is due to the fact that technetium is an unstable (radioactive) element.
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: Since technetium is unstable, only minute traces occur naturally in the Earth's crust as a spontaneous fission product of uranium.