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href="http://dbpedia.org/resource/Core_electron">Core electron</a> </h1> </div> </div> <div class="row"> <div class="col"> <div class="text-muted"> An Entity of Type: <a href="javascript:void()">Thing</a>, from Named Graph: <a href="http://dbpedia.org">http://dbpedia.org</a>, within Data Space: <a href="http://dbpedia.org">dbpedia.org</a> </div> </div> </div> <div class="row pt-2"> <div class="col-xs-9 col-sm-10"> Core electrons are the electrons in an atom that are not valence electrons and do not participate in chemical bonding. The nucleus and the core electrons of an atom form the atomic core. Core electrons are tightly bound to the nucleus. Therefore, unlike valence electrons, core electrons play a secondary role in chemical bonding and reactions by screening the positive charge of the atomic nucleus from the valence electrons. The number of valence electrons of an element can be determined by the periodic table group of the element (see valence electron): </div> <div class="col-xs-3 col-sm-2"> <a href="#" class="thumbnail"> <img src="http://commons.wikimedia.org/wiki/Special:FilePath/ADOMAH_periodic_table_(horizontal)_-_electron_orbitals.svg?width=300" alt="thumbnail" class="img-fluid" /> </a> </div> </div> </div> </section>   <section> <div class="container-xl"> <div class="row"> <div class="table-responsive"> <table class="table table-hover table-sm table-light"> <thead> <tr> <th class="col-xs-3 ">Property</th> <th class="col-xs-9 px-3">Value</th> </tr> </thead> <tbody> <tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/ontology/abstract">dbo:abstract</a> </td><td class="col-10 text-break"><ul> <li style="display:none;">Als innere Elektronen werden Elektronen eines Atoms bezeichnet, die nicht zur Valenzschale (äußerste Schale) gehören und somit nicht an chemischen Bindungen beteiligt sind. Innere Elektronen können durch Teilchen mit hoher kinetischer Energie aus dem Atom herausgeschlagen werden. Das nun fehlende Elektron wird durch ein energetisch höherliegendes Elektron ersetzt. Die dabei frei werdende Energie kann als charakteristische Röntgenstrahlung oder als kinetische Energie an ein Elektron der äußeren Schale abgegeben werden. Letzteres wird dann Augerelektron genannt und in der Auger-Elektronen-Spektroskopie zur Untersuchung von Festkörpern genutzt. (de)</li> <li>Core electrons are the electrons in an atom that are not valence electrons and do not participate in chemical bonding. The nucleus and the core electrons of an atom form the atomic core. Core electrons are tightly bound to the nucleus. Therefore, unlike valence electrons, core electrons play a secondary role in chemical bonding and reactions by screening the positive charge of the atomic nucleus from the valence electrons. The number of valence electrons of an element can be determined by the periodic table group of the element (see valence electron): * For main group elements, the number of valence electrons ranges from 1-8 electrons (ns and np orbitals). * For transition metals, the number of valence electrons ranges from 3-12 electrons (ns and (n−1)d orbitals). * For lanthanides and actinides, the number of valence electrons ranges from 3-16 electrons (ns, (n−2)f and (n−1)d orbitals). All other non-valence electrons for an atom of that element are considered core electrons. (en)</li> <li style="display:none;">En física y química, los electrones internos son los electrones que están muy fuertemente ligados al núcleo atómico y no contribuyen a los enlaces químicos. Según el contexto, la expresión puede igualmente designar los electrones que ocupan los orbitales atómicos más bajos de un átomo. En oposición, los electrones de valencia son los electrones que contribuyen a los enlaces químicos. Los electrones internos tienden a apantallar el efecto del núcleo y así los electrones de valencia están ligados más débilmente a su átomo. En metales, al sistema compuesto del núcleo y los electrones internos se le conoce como ion y los electrones libres son llamados electrones de conducción. (es)</li> <li style="display:none;">En physique ou en chimie, les électrons de cœur sont des électrons dont on considère qu'ils sont très fortement liés à leur atome et ne contribuent pas à la liaison chimique, par opposition aux électrons de valence. Selon le contexte, l'expression peut également désigner les électrons occupant les orbitales les plus basses d'un atome. Il n'existe pas de définition absolue de ce qu'est un électron de cœur. La distinction entre électrons de cœur et électrons de valence est dans une certaine mesure un choix arbitraire qui dépend avant tout des différentes approximations que l'on applique aux électrons dans un problème particulier. (fr)</li> <li style="display:none;">Na leictreoin san adamh atá níos gaire don núicléas ná na leictreoin fiúsachta. De ghnáth, ní bhíonn aon pháirt acu in imoibreacha ceimiceacha. (ga)</li> <li style="display:none;">Gli elettroni del guscio interno o elettroni di core (dall'inglese core electrons) sono gli elettroni di un atomo che non sono di valenza e perciò non partecipano al legame chimico. Si consideri ad esempio il carbonio: il carbonio possiede 6 elettroni in totale, di cui 4 sono elettroni di valenza; di conseguenza i rimanenti 2 elettroni sono elettroni di core. Gli elettroni di core sono chiamati in tal modo perché si trovano negli orbitali o livelli atomici ad energia più bassa, il che corrisponde ad essere più vicini al nucleo (core) e più legati all'atomo. Essi sono così fortemente legati al nucleo da essere perturbati in modo assolutamente trascurabile dall'ambiente esterno all'atomo, anche nel caso quest'ultimo fosse legato ad altri atomi.Perciò, al contrario degli elettroni di valenza, gli elettroni di core di solito rivestono un ruolo secondario nel legame e nelle reazioni chimiche. Il loro ruolo primario consiste nello schermare (almeno parzialmente) la carica positiva del nucleo atomico, permettendo così agli elettroni più esterni, cioè gli elettroni di valenza, di partecipare al legame chimico. Il loro effetto è anche particolarmente significativo nell'ambito di particolari metodiche spettroscopiche. Nei metalli di transizione, comunque, la distinzione tra elettroni di valenza e quelli di core è molto più sottile e potrebbe essere importante considerare gli elettroni negli "orbitali d" a più alta energia come elettroni di valenza piuttosto che elettroni di core. (it)</li> <li style="display:none;">Elektron niewalencyjny – elektron, znajdujący się w atomie na niższej energetycznie od najwyższej powłoce elektronowej. Elektrony niewalencyjne tworzą wraz z jądrem atomowym tzw. rdzeń atomowy i nie uczestniczą w tworzeniu wiązań chemicznych. (pl)</li> <li style="display:none;">原子实（atomic core，atomic kernel）物理学界又称之为“原子芯”，是一个应用越来越广泛的概念。在书写电子排布式时，通常把内层电子已达到稀有气体结构的部分写成稀有气体的元素符号外加方括号的形式来表示，这部分称为“原子实”。比如钪的基态原子电子排布式为：1s22s22p63s23p63d14s2，也可以表示为[Ar]3d14s2。根据定义可知，不可由原子实直接表示对应稀有气体的电子排布式。 (zh)</li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" href="http://dbpedia.org/ontology/thumbnail">dbo:thumbnail</a> </td><td class="col-10 text-break"><ul> <li><a class="uri" rel="dbo:thumbnail" resource="http://commons.wikimedia.org/wiki/Special:FilePath/ADOMAH_periodic_table_(horizontal)_-_electron_orbitals.svg?width=300" href="http://commons.wikimedia.org/wiki/Special:FilePath/ADOMAH_periodic_table_(horizontal)_-_electron_orbitals.svg?width=300">wiki-commons:Special:FilePath/ADOMAH_periodic_table...al)_-_electron_orbitals.svg?width=300</a></li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://dbpedia.org/ontology/wikiPageID">dbo:wikiPageID</a> </td><td class="col-10 text-break"><ul> <li>5129473 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href="http://dbpedia.org/resource/Category:Atomic,_molecular,_and_optical_physics">dbc:Atomic,_molecular,_and_optical_physics</a></li> </ul></td></tr><tr class="odd"><td class="col-2"><a class="uri" href="http://purl.org/linguistics/gold/hypernym">gold:hypernym</a> </td><td class="col-10 text-break"><ul> <li><a class="uri" rel="gold:hypernym" resource="http://dbpedia.org/resource/Electrons" prefix="gold: http://purl.org/linguistics/gold/" href="http://dbpedia.org/resource/Electrons">dbr:Electrons</a></li> </ul></td></tr><tr class="even"><td class="col-2"><a class="uri" href="http://www.w3.org/2000/01/rdf-schema#comment">rdfs:comment</a> </td><td class="col-10 text-break"><ul> <li style="display:none;">Als innere Elektronen werden Elektronen eines Atoms bezeichnet, die nicht zur Valenzschale (äußerste Schale) gehören und somit nicht an chemischen Bindungen beteiligt sind. Innere Elektronen können durch Teilchen mit hoher kinetischer Energie aus dem Atom herausgeschlagen werden. Das nun fehlende Elektron wird durch ein energetisch höherliegendes Elektron ersetzt. Die dabei frei werdende Energie kann als charakteristische Röntgenstrahlung oder als kinetische Energie an ein Elektron der äußeren Schale abgegeben werden. Letzteres wird dann Augerelektron genannt und in der Auger-Elektronen-Spektroskopie zur Untersuchung von Festkörpern genutzt. (de)</li> <li style="display:none;">Na leictreoin san adamh atá níos gaire don núicléas ná na leictreoin fiúsachta. De ghnáth, ní bhíonn aon pháirt acu in imoibreacha ceimiceacha. (ga)</li> <li style="display:none;">Elektron niewalencyjny – elektron, znajdujący się w atomie na niższej energetycznie od najwyższej powłoce elektronowej. Elektrony niewalencyjne tworzą wraz z jądrem atomowym tzw. rdzeń atomowy i nie uczestniczą w tworzeniu wiązań chemicznych. (pl)</li> <li style="display:none;">原子实（atomic core，atomic kernel）物理学界又称之为“原子芯”，是一个应用越来越广泛的概念。在书写电子排布式时，通常把内层电子已达到稀有气体结构的部分写成稀有气体的元素符号外加方括号的形式来表示，这部分称为“原子实”。比如钪的基态原子电子排布式为：1s22s22p63s23p63d14s2，也可以表示为[Ar]3d14s2。根据定义可知，不可由原子实直接表示对应稀有气体的电子排布式。 (zh)</li> <li>Core electrons are the electrons in an atom that are not valence electrons and do not participate in chemical bonding. The nucleus and the core electrons of an atom form the atomic core. Core electrons are tightly bound to the nucleus. Therefore, unlike valence electrons, core electrons play a secondary role in chemical bonding and reactions by screening the positive charge of the atomic nucleus from the valence electrons. The number of valence electrons of an element can be determined by the periodic table group of the element (see valence electron): (en)</li> <li style="display:none;">En física y química, los electrones internos son los electrones que están muy fuertemente ligados al núcleo atómico y no contribuyen a los enlaces químicos. Según el contexto, la expresión puede igualmente designar los electrones que ocupan los orbitales atómicos más bajos de un átomo. En oposición, los electrones de valencia son los electrones que contribuyen a los enlaces químicos. Los electrones internos tienden a apantallar el efecto del núcleo y así los electrones de valencia están ligados más débilmente a su átomo. (es)</li> <li style="display:none;">En physique ou en chimie, les électrons de cœur sont des électrons dont on considère qu'ils sont très fortement liés à leur atome et ne contribuent pas à la liaison chimique, par opposition aux électrons de valence. Selon le contexte, l'expression peut également désigner les électrons occupant les orbitales les plus basses d'un atome. (fr)</li> <li style="display:none;">Gli elettroni del guscio interno o elettroni di core (dall'inglese core electrons) sono gli elettroni di un atomo che non sono di valenza e perciò non partecipano al legame chimico. Si consideri ad esempio il carbonio: il carbonio possiede 6 elettroni in totale, di cui 4 sono elettroni di valenza; di conseguenza i rimanenti 2 elettroni sono elettroni di core. 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