Electronic configuration definition of Electronic configuration in the Free Online Encyclopedia.

electron configuration [i′lek‚trän kən‚fig·yə′rā·shən]

(atomic physics)

The orbital and spin arrangement of an atom's electrons, specifying the quantum numbers of the atom's electrons in a given state.

Electron configuration

The orbital arrangement of an atom's electrons. Negatively charged electrons are attracted to a positively charged nucleus to form an atom or ion. Although such bound electrons exhibit a high degree of quantum-mechanical wavelike behavior, there still remain particle aspects to their motion. Bound electrons occupy orbitals that are somewhat concentrated in spatial shells lying at different distances from the nucleus. As the set of electron energies allowed by quantum mechanics is discrete, so is the set of mean shell radii. Both these quantized physical quantities are primarily specified by integral values of the principal, or total, quantum number n. The full electron configuration of an atom is correlated with a set of values for all the quantum numbers of each and every electron. In addition to n, another important quantum number is l, an integer representing the orbital angular momentum of an electron in units of h/2π, where h is Planck's constant. The values 1, 2, 3, 4, 5, 6, 7 for n and 0, 1, 2, 3 for l together suffice to describe the electron configurations of all known normal atoms and ions, that is, those that have their lowest possible values of total electronic energy. The first seven shells are also given the letter designations K, L, M, N, O, P, and Q respectively. Electrons with l equal to 0, 1, 2, and 3 are designated s, p, d, and f, respectively. See Quantum mechanics, Quantum numbers

In any configuration the number of equivalent electrons (same n and l) is indicated by an integral exponent (not a quantum number) attached to the letters s, p, d, and f. According to the Pauli exclusion principle, the maximum is s², p⁶, d¹⁰, and f¹⁴. See Exclusion principle

An electron configuration is categorized as having even or odd parity, according to whether the sum of p and f electrons is even or odd. Strong spectral lines result only from transitions between configurations of unlike parity. See Parity (quantum mechanics)

Insofar as they are known from spectroscopic investigations, the electron configurations characteristic of the normal or ground states of the first 103 chemical elements are shown in the table.

In the next-to-last column of the table, the spectral term of the energy level with lowest total electronic energy is shown. The main part of the term symbol is a capital letter, S, P, D, F, and so on, that represents the total electronic orbital angular momentum. Attached to this is a superior prefix, 1, 2, 3, 4, and so on, that indicates the multiplicity, and an anterior suffix, 0, 12, 1, 32, 2, 52, and so on, that shows the total angular momentum, or J value, of the atom in the given state. A sign ° above the J value signifies that the spectral term and electron configuration have odd parity.

The last column of the table presents the first ionization potential of the atom, the energy required to remove from an atom its least firmly bound electron and transform a neutral atom into a singly charged ion. See Atomic structure and spectra, Ionization potential

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No references found	It is an in-depth examination of the field through twelve papers on philosophy of chemistry and the question of reduction; the periodic table, electronic configurations and the nature of elements, and realism and anti-realism; and educational issues in the field. Collected papers on philosophy of chemistry by SciTech Book News No atoms in the compound have the requisite electronic configurations to generate magnetic moments, Ott says. Ghostly magnetism comes from nowhere by Science News Automated electronic configuration and distribution via XML. Framework Inc. Enhances LendWare Product Manager by Business Wire	electronic bearing cursor electronic bearing marker electronic calculating punch electronic calculator electronic camouflage electronic cash register electronic chart electronic chart display and information system electronic chart reader electronic cigarette electronic cinema electronic circuit Electronic Circuit Engineering electronic clock Electronic Clocks and Watches electronic code book electronic codebook mode electronic commerce Electronic Commerce Dictionary electronic commutator electronic component electronic composition Electronic Computer Electronic Computer Glossary electronic computing units Electronic configuration electronic confusion area electronic control electronic controller electronic counter electronic countermeasure Electronic Countermeasures electronic coupling electronic data interchange electronic data processing electronic data-processing center electronic data-processing management science electronic data-processing system electronic deception electronic defense evaluation Electronic Design Automation electronic differential analyzer electronic display electronic distance-measuring equipment electronic driftmeter electronic dummy electronic efficiency electronic emission spectrum electronic energy curve electronic engineering Electronic Engraver	Electronic Components and Technology Conference Electronic Components Association - Australia and New Zealand Electronic Components Group Electronic Components Industries Association Electronic Components Institute Internationale Ltd. Electronic Components Reliability Center Electronic Components, Assemblies, Equipment and Supplies Association Electronic Components, Technology and Materials electronic composition electronic computer electronic computer electronic computer Electronic Computer Crime Electronic Computer Glossary Electronic Computer Originated Mail Electronic Computer Programming Institute Electronic Computer Waste Services Electronic Computer-Aided Design Electronic Computer-Originated Mail Electronic computers Electronic computers Electronic computers Electronic computing Electronic computing Electronic computing Electronic computing electronic computing units Electronic Concepts Simulation Research Laboratory Electronic Conference on Synthetic Organic Chemistry Electronic Conference on Trends in Organic Chemistry Electronic configuration Electronic Configuration Control Board Electronic Confirmation of Enrolment electronic confusion area Electronic Construction Cost Electronic Consult System Electronic Content Management Electronic Content Management Practitioner Electronic Continuing Professional Development Electronic Continuously Variable Transmission Electronic Contracts Folder Electronic Control Electronic Control Electronic Control Amplifier Electronic Control Code Electronic Control Company Electronic Control Fuel Injection Electronic Control Gear Electronic control module Electronic Control Security, Inc. Electronic Control Signal Processor Electronic Control System Electronic Control Transmission Electronic control unit Electronic Control Unit Communications Module Electronic Controlled Drug Register

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It is an in-depth examination of the field through twelve papers on philosophy of chemistry and the question of reduction; the periodic table, electronic configurations and the nature of elements, and realism and anti-realism; and educational issues in the field.

Collected papers on philosophy of chemistry by SciTech Book News

No atoms in the compound have the requisite electronic configurations to generate magnetic moments, Ott says.

Ghostly magnetism comes from nowhere by Science News

Automated electronic configuration and distribution via XML.

Framework Inc. Enhances LendWare Product Manager by Business Wire

electronic bearing cursor

electronic bearing marker

electronic calculating punch

electronic calculator

electronic camouflage

electronic cash register

electronic chart