Transcription of HYDROGEN - NCERT
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HYDROGEN - NCERT
276 CHEMISTRY. UNIT 9. HYDROGEN . d he HYDROGEN , the most abundant element in the universe and the third most abundant on the surface of the globe, is being visualised as the major future source of energy. is After studying this unit, you will be able to present informed opinions on the bl position of HYDROGEN in the periodic table; HYDROGEN has the simplest atomic structure among all the identify the modes of occurrence pu elements around us in Nature. In atomic form it consists and preparation of dihydrogen on of only one proton and one electron. However, in elemental a small and commercial scale;. describe isotopes of HYDROGEN ;. form it exists as a diatomic (H2) molecule and is called explain how different elements dihydrogen.
Reactions with metals: With many metals it combines at a high temperature to yield the corresponding hydrides (section 9.5) H2(g) +2M(g) → 2MH(s); where M is an alkali metal Reactions with metal ions and metal oxides: It reduces some metal ions in aqueous solution and oxides of metals (less active than iron) into corresponding metals
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