semiempirical formula

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• Nuclear binding energy — is the energy required to split a nucleus of an atom into its component parts. The component parts are neutrons and protons, which are collectively called nucleons. If the binding energy for the products is higher when light nuclei fuse, or when… …   Wikipedia

• William Prout — FRS (January 15, 1785 ndash; April 9, 1850) was an English chemist, physician, and natural theologian. He is remembered today mainly for what is called Prout s hypothesis. Life and work Prout was born in Horton, Gloucestershire in 1785. His… …   Wikipedia

• Prout's hypothesis — was an early 19th century attempt to explain the existence of the various chemical elements through a hypothesis regarding the internal structure of the atom. In 1815 [William Prout (1815). On the relation between the specific gravities of bodies …   Wikipedia

• Isotopes of technetium — Technetium (Tc) is one of the two elements in the first 82 that have no stable isotopes (in fact, it is the lowest numbered element that is exclusively radioactive); the other such element is promethium. [ LANL Periodic Table , Technetium… …   Wikipedia

• William Prout — por Henry Wyndham Phillips[1] William Prout (Horton, Gloucestershire, 15 de enero de 1785 – Londres, 9 de abril de 1850) fue un químico …   Wikipedia Español

• 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

• radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …   Universalium

• Outline of chemistry — The following outline is provided as an overview of and topical guide to chemistry: Chemistry – science of atomic matter (matter that is composed of chemical elements), especially its chemical reactions, but also including its properties,… …   Wikipedia

• Topic outline of chemistry — For a more comprehensive list, see the List of chemistry topics. Chemistry is the science of matter at the atomic to molecular scale, dealing primarily with collections of atoms, such as molecules, crystals, and metals. Chemistry deals with the… …   Wikipedia

• Density functional theory — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory …   Wikipedia

• aesthetics — /es thet iks/ or, esp. Brit., /ees /, n. (used with a sing. v.) 1. the branch of philosophy dealing with such notions as the beautiful, the ugly, the sublime, the comic, etc., as applicable to the fine arts, with a view to establishing the… …   Universalium