<P> For the first six periods of the periodic table , the noble gases are exactly the members of group 18 . Noble gases are typically highly unreactive except when under particular extreme conditions . The inertness of noble gases makes them very suitable in applications where reactions are not wanted . For example , argon is used in light bulbs to prevent the hot tungsten filament from oxidizing ; also , helium is used in breathing gas by deep - sea divers to prevent oxygen , nitrogen and carbon dioxide ( hypercapnia ) toxicity . </P>
<P> For the first six periods of the periodic table , the noble gases are exactly the members of group 18 . Noble gases are typically highly unreactive except when under particular extreme conditions . The inertness of noble gases makes them very suitable in applications where reactions are not wanted . For example , argon is used in light bulbs to prevent the hot tungsten filament from oxidizing ; also , helium is used in breathing gas by deep - sea divers to prevent oxygen , nitrogen and carbon dioxide ( hypercapnia ) toxicity . </P>
where are noble gasses found on the periodic table
where are noble gasses found on the periodic table
group 18
group 18