Assertion: krypton | /r/AtLocation | the air
Facets:
value: at about 1 ppm
type: OTHER
Source sentences:
text: Krypton is present in the air to the extent of about 1 ppm.
text: Krypton is present in air at a concentration of about 3 parts per million by volume.
text: krypton is present in the air at about 1 ppm.
text: Krypton is present in the air at about 1 ppm.
text: Krypton is one of the rarest gases in the Earth’s atmosphere, it is present in the air to the extent of about 1 ppm (part per million).
text: Krypton is present in the air at about 1 ppm.
text: Krypton is present in the air to the extent of about 1 ppm.
text: Krypton is present in the air to the extent of about 1 ppm.