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Hydrogen atom. Depiction of a hydrogen atom showing the diameter as about twice the Bohr model radius. (Image not to scale) A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force.
The Executor was a liquid-fueled rocket engine intended to power the IAR-111 Excelsior supersonic plane and Haas 2B and 2C rockets. Executor was an open cycle gas generator rocket engine, that uses liquid oxygen and kerosene and has a maximum thrust of 24 tons force. ARCA decided to use composite materials and aluminum alloys on a large scale.
The spectral series of hydrogen, on a logarithmic scale. The emission spectrum of atomic hydrogen has been divided into a number of spectral series, with wavelengths given by the Rydberg formula. These observed spectral lines are due to the electron making transitions between two energy levels in an atom. The classification of the series by the ...
Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom H and a chlorine atom Cl connected by a polar covalent bond. The chlorine atom is much more electronegative than the hydrogen atom, which makes this bond polar. Consequently, the molecule has a large dipole moment with a negative partial charge (δ−) at the chlorine atom ...
Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: [1] Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy. A version of water splitting occurs in photosynthesis, but hydrogen is not produced. The reverse of water splitting is the ...
is the least stable, while 7. H. is the most. Hydrogen is the only element whose isotopes have different names that remain in common use today: the 2. H. (or hydrogen-2) isotope is deuterium [6] and the 3. H. (or hydrogen-3) isotope is tritium. [7] The symbols D and T are sometimes used for deuterium and tritium.
Hydrogen embrittlement ( HE ), also known as hydrogen-assisted cracking or hydrogen-induced cracking ( HIC ), is a reduction in the ductility of a metal due to absorbed hydrogen. Hydrogen atoms are small and can permeate solid metals. Once absorbed, hydrogen lowers the stress required for cracks in the metal to initiate and propagate, resulting ...
A symmetric hydrogen bond is a special type of hydrogen bond in which the proton is spaced exactly halfway between two identical atoms. The strength of the bond to each of those atoms is equal. It is an example of a three-center four-electron bond. This type of bond is much stronger than a "normal" hydrogen bond.