octet formula

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• Regle de l'octet — Règle de l octet Les liaisons chimiques dans le dioxyde de carbone (CO2) Tous les atomes sont entourés de 8 électrons comme prédit par la règle de l octet . CO2 est donc une molécule stable. La règle de l octet est une règle chimique simple qui… …   Wikipédia en Français

• Règle de l'octet — Les liaisons chimiques dans le dioxyde de carbone (CO2) Tous les atomes sont entourés de 8 électrons comme prédit par la règle de l octet . CO2 est donc une molécule stable. La règle de l octet est une règle chimique simple qui énonce que les… …   Wikipédia en Français

• chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

• Lewis structure — The Lewis structure of water. Lewis structures (also known as Lewis dot diagrams, electron dot diagrams, and electron dot structures) are diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in …   Wikipedia

• nitrogen group element — ▪ chemical elements Introduction  any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …   Universalium

• Oxyanion — An oxyanion or oxoanion is a chemical compound with the generic formula AxOyz− (where A represents a chemical element and O represents an oxygen atom). Oxyanions are formed by a large majority of the chemical elements.[1] The formulae of simple… …   Wikipedia

• List of baryons — This list is of all known and predicted baryons. See list of particles for a more detailed list of particles found in particle physics. Baryons, being composed of quarks, are part of the subatomic particle family called the hadrons. Baryons are… …   Wikipedia

• Denis Griffiths — Denis Griffiths, tenor, publicity shot taken for use in BBC Radio Times, c.1950 Denis Griffiths (1922–2001), Welsh lyric tenor who regularly performed on BBC radio from the late 1940s onwards and who later featured among the soloists in the… …   Wikipedia

• chemistry — /kem euh stree/, n., pl. chemistries. 1. the science that deals with the composition and properties of substances and various elementary forms of matter. Cf. element (def. 2). 2. chemical properties, reactions, phenomena, etc.: the chemistry of… …   Universalium

• History of the molecule — In chemistry, the history of the molecule traces the origins of the concept or idea of the existence of strong chemical bonds between two or more atoms. The modern concept of molecules can be traced back towards pre scientific Greek philosophers… …   Wikipedia

• Compounds of zinc — are chemical compounds containing the element zinc which is a member of the group 12 of the periodic table. The oxidation state of most compounds is the group oxidation state of +2. Zinc may be classified as a post transition main group element… …   Wikipedia