Assertion: noble gas | /r/HasProperty | last column
Facets:
Source sentences:
text: These non-metal anions (negative ions) will gain electrons to become the very next noble gas (last column) on the periodic table.
text: Xenon is element 54, in the noble gases (last) column.
text: As a result, they were the last elements to be discovered.
text: Note that the Noble gases are the last column on the right side of the Periodic table, He, Ne, Ar, Kr, Xe, Rn, Uuo(temporary man made super heavy element, resembles Rn chemical prop.)