structure of hydrogen atom
1Hydrogen 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 …
2Hydrogen-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… …
3hydrogen 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… …
4Structure fine — de l hydrogène : influence de la levée partielle de la dégénérescence du niveau d énergie n = 2 sur la raie Lyman α. En physique atomique, la structure fine de la raie spectrale d un atome correspond à sa séparation en plusieurs composantes… …
5atom — /at euhm/, n. 1. Physics. a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical… …
6Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium …
7Atom — The atom is the smallest unit of an element that retains the chemical properties of that element. An atom has an electron cloud consisting of negatively charged electrons surrounding a dense nucleus. The nucleus contains positively charged… …
8Hydrogen bond — A hydrogen bond results from a dipole dipole force between an electronegative atom and a hydrogen atom bonded to nitrogen, oxygen or fluorine (thus the name hydrogen bond , which must not be confused with a covalent bond to hydrogen). The energy… …
9Hydrogen chloride — HCl redirects here. For the acid, see Hydrochloric acid. Hydrogen chloride …
10hydrogen — /huy dreuh jeuhn/, n. a colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known elements. Symbol: H; at. wt.: 1.00797; at. no.: 1; density: 0.0899 g/l at 0°C and 760 mm pressure. [1785 95;… …
