Noble gases Application s
Home | Free Practice Tests Noble Gases and Their Uses The noble gases occupy the last group of the periodic table, i.e. group 0. They consist of Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and Radon (Rn). They are all non-metallic elements and colorless gasses at room temperature and pressure. They form 1% of air, and most of this is argon. Neon, argon, krypton, and xenon are obtained by fractional distillation of liquid air (Helium is also obtained in small quantities from this source) - see the table for: the boiling points and properties of noble gases . Radon is obtained from radium salt. Uses of Noble Gases The very inertness of the noble gases is an important feature of their practical uses. Helium Helium is much less dense (lighter) than air and is used in balloons and blimps. Because of its inertness, it doesn’t burn in air unlike hydrogen which was formally used in large balloons with ‘flammable’ consequences. Helium is less soluble in water th