Assertion: argon's number | /r/HasProperty | atomic
Facets:
Source sentences:
text: Argon is atomic number 18 on the periodic table, with the element symbol Ar.
text: Atomic Number: 18 Atomic Symbol: Ar Atomic Weight:
text: Atomic number: 18 Atomic weight: 39.948 Average concentration in ocean: 15.5 �mol/kg Residence time: yrs
text: Argon is a chemical element with symbol Ar and atomic number 18.
text: Argon is a chemical element with symbol Ar and atomic number 18.
text: Argon is a chemical element with symbol Ar and atomic number 18.
text: In the periodic table, it is designated ‘Ar’ as the symbol, while its atomic number is 18.