Noble gas
The noble gases are the
chemical elements in group 18 of the periodic table. This chemical series contains
helium,
neon,
argon,
krypton,
xenon, and radon.
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Encyclopedia
The
noble gases are the
chemical elements in group 18 of the periodic table. This chemical series contains
helium,
neon,
argon,
krypton,
xenon, and radon.