hydrogen atom

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• Hydrogen atom — Stable Isotope isotope name = Hydrogen 1 isotope filename = hydrogen 1.png alternate names = protium mass number = 1 symbol = H num neutrons = 0 num protons = 1 abundance = 99.985% mass = 1.007825 spin = ½+ excess energy = 7288.969 error1 = 0.001 …   Wikipedia

• hydrogen atom — noun an atom of hydrogen (Freq. 10) • Hypernyms: ↑atom • Hyponyms: ↑acidic hydrogen, ↑acid hydrogen, ↑deuterium, ↑heavy hydrogen • Part Meronyms: ↑ …   Useful english dictionary

• Atom — • Primarily, the smallest particle of matter which can exist Catholic Encyclopedia. Kevin Knight. 2006. Atom     Atom     † …   Catholic encyclopedia

• hydrogen bond — n an electrostatic attraction between a hydrogen atom in one polar molecule (as of water) and a small electronegative atom (as of oxygen, nitrogen, or fluorine) in usu. another molecule of the same or a different polar substance hydrogen bonding… …   Medical dictionary

• Hydrogen-deuterium exchange — (also called H D or H/D exchange) is a chemical reaction in which a covalently bonded hydrogen atom is replaced by a deuterium atom, or vice versa. Usually the examined protons are the amides in the backbone of a protein. The method gives… …   Wikipedia

• hydrogen ion — n 1) the cation H+ of acids consisting of a hydrogen atom whose electron has been transferred to the anion of the acid 2) HYDRONIUM * * * the nucleus of the hydrogen atom or a hydrogen atom that has lost its electron, H+; it bears a positive… …   Medical dictionary

• Hydrogen halide — Hydrogen halides (or hydrohalic acids) are acids resulting from the chemical reaction of hydrogen with one of the halogen elements (fluorine, chlorine, bromine, iodine), which are found in Group 7 of the periodic table. Astatine is not included… …   Wikipedia

• Hydrogen (disambiguation) — Hydrogen is a chemical element.Hydrogen may also refer to:* Hydrogen atom * Hydrogen ion * Hydrogen (software) * Hydrogen vehicle * Isotopes of hydrogen ** Hydrogen 2 (deuterium) ** Hydrogen 3 (tritium) ** Hydrogen 4 ** Hydrogen 5ee also*… …   Wikipedia

• Hydrogen ion — is recommended by IUPAC as a general term for all ions of hydrogen and its isotopes. [ Compendium of Chemical Terminology , 2nd edition McNaught, A.D. and Wilkinson, A. Blackwell Science, 1997 [ISBN 0 86542 684 8] , also… …   Wikipedia

• Hydrogen ion — Hydrogen er et grundstof. Et hydrogen atom angives tit bare med et H. Hvis hydrogen atomet mangler en elektron, vil det gerne reagere med andre grundstoffer og molekyler. Når det sker kaldes hydrogen i stedet for en hydrogen ion. En hydrogen ion… …   Danske encyklopædi

• hydrogen bond — n. a weak chemical bond formed through a hydrogen atom, esp. if bridging two similar electronegative atoms or groups from two different molecules …   English World dictionary