The Element Hydrogen - Basic Physical and Historical Information ...

Electron Transitions The Bohr model for an electron transition in hydrogen between quantized energy levels with different quantum numbers n yields a photon by emission with quantum energy: This is often expressed in terms of the inverse wavelength or wave number as follows: Index HyperPhysics***** Quantum Physics Go Back Hydrogen Energy Levels The basic hydrogen energy level structure is in ...

Home About This Site Comments Help Links Window Version Show Table With: Name Atomic Number Atomic Mass Electron Configuration Number of Neutrons Melting Point Boiling Point Date of Discovery Crystal Structure Element Groups: Alkali Metals Alkaline Earth Metals Transition Metals Other Metals Metalloids Non-Metals Halogens Noble Gases Rare Earth Elements Basic Information | Atomic Structure | ...

Discovered : by Henry Cavendish in 1766 Isolated in London, UK Origin : The name is derived from the Greek hydro genes, meaning water forming. Description : A colourless, odourless gas that burns and can form an explosive mixture with air. It is currently manufactured from methane gas, but could be produced by the electrolysis of water. The gas is used to make such key materials as ammonia, ...

HYDROGEN -- H2 Hydrogen is an important commercial chemical. It is prepared industrially by two processes: the water gas reaction using coke and water (equation 1), and the steam reforming process using natural gas and water (equation 2). Both reactions require high temperatures. C(s) + H2O(g) CO(g) + H2(g) (1) CH4(g) + H2O(g) CO(g) + 3 H2(g) (2) The mixture of products from these two ...

Hydrogen - H2 - Hydrogen is widely used for the hydrogenation of vegetable and animal oils and fats. Hydrogen also finds uses in the metallurgy field because of its ability to reduce metal oxides and prevent oxidation of metals in heat treating certain metals and alloys. Hydrogen is extensively used in the synthesis of ammonia and in petroleum refining operations. Liquified hydrogen has been ...