Assertion: krypton's line | /r/HasProperty | an isotope of krypton
Facets:
Source sentences:
text: In 1960, the length of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.
text: From 1960 to 1983, the distance of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.
text: In 1960, the length of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.
text: In 1960, the length of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.
text: In 1960, the length of the meter was defined in terms of the orange-red spectral line of krypton-86, an isotope of krypton.