DescriptionHydrogen has the simplest atomic structure among all the elements around us in Nature. In atomic form it consists of only one proton and one electron. However, in elemental form it exists as a diatomic (H2) molecule and is called dihydrogen. It forms more compounds than any otherelement. Do you know that the global concern related to energy can be overcome to a great extent by the use of hydrogen as a source of energy? In fact, hydrogen is of great industrial importance as you will learn in this unit. SUMMARYHydrogen is the lightest atom with only one electron. Loss of this electron results in an elementary particle, the proton. Thus, it is unique in character. It has three isotopes, namely: protium (1 1H), deuterium (D or 2 1H) and tritium (T or 3 1H). Amongst these three, only tritium is radioactive. Inspite of its resemblance both with alkali metals and halogens, it occupies a separate position in the periodic table because of its unique properties. Hydrogen is the most abundant element in the universe. In the free state it is almost not found in the earths atmosphere. However, in the combined state, it is the third most abundant element on the earths surface. Dihydrogen on the industrial scale is prepared by the water-gas shift reaction from petrochemicals. It is obtained as a byproduct by the electrolysis of brine. Course ContentUses of DihydrogenUses of Hydrogen PeroxideResemblance with Alkali Metals and HalogensIsotopes, Allotropes & Molecular forms of HydrogenWater - IntroductionPhysical and Chemical Properties of HydrogenHydridesChemical properties of waterPhysical Properties of Hydrogen PeroxideStrenth of Hydrogen peroxideStructure of WaterEffects and Uses of Heavy WaterPreparation of Hydrogen PeroxideHeavy WaterHard & Soft WaterRemoval of Hardness of WaterDissimilarities of hydrogen with halogensConcentration of Hydrogen peroxide ans its storage
