soygazlar çok kararlı yapıda olduklarından reaktif elementlere koruyucu tabaka olarak görev yaparlar. bir gün sodyum satın alırsanız, bu 1A grubu elementin argon (18) ile doldurulmuş mühürlü bir kapta teslim edildiğini göreceksiniz.
Hydrogen is the lightest of all the gases lighter even than helium and much cheaper, which accounts for its ill-advised use in early airships such as the Hindenburg. You may have heard how well that went, though in fairness the people died because they fell, not because they were burned by the hydrogen, which in some ways is less dangerous to have in a vehicle than, say, gasoline.