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- Actinide abstract "The actinide /ˈæktɨnaɪd/ or actinoid /ˈæktɨnɔɪd/ (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.The actinide series derives its name from the group 3 element actinium. The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide. All but one of the actinides are f-block elements, corresponding to the filling of the 5f electron shell; lawrencium, a d-block element, is also generally considered an actinide. In comparison with the lanthanides, also mostly f-block elements, the actinides show much more variable valence.Of the actinides, primordial thorium and uranium occur naturally in substantial quantities and small amounts of persisting natural plutonium have also been identified. The radioactive decay of uranium produces transient amounts of actinium and protactinium, and atoms of neptunium, americium, curium, berkelium and californium are occasionally produced from transmutation reactions in uranium ores. The other actinides are purely synthetic elements. Nuclear weapons tests have released at least six actinides heavier than plutonium into the environment; analysis of debris from a 1952 hydrogen bomb explosion showed the presence of americium, curium, berkelium, californium, einsteinium and fermium.All actinides are radioactive and release energy upon radioactive decay; naturally occurring uranium and thorium, and synthetically produced plutonium are the most abundant actinides on Earth. These are used in nuclear reactors and nuclear weapons. Uranium and thorium also have diverse current or historical uses, and americium is used in the ionization chambers of most modern smoke detectors.In presentations of the periodic table, the lanthanides and the actinides are customarily shown as two additional rows below the main body of the table, with placeholders or else a selected single element of each series (either lanthanum or lutetium, and either actinium or lawrencium, respectively) shown in a single cell of the main table, between barium and hafnium, and radium and rutherfordium, respectively. This convention is entirely a matter of aesthetics and formatting practicality; a rarely used wide-formatted periodic table inserts the lanthanide and actinide series in their proper places, as parts of the table's sixth and seventh rows (periods).".
- Actinide thumbnail Nagasakibomb.jpg?width=300.
- Actinide wikiPageExternalLink arq.lanl.gov.
- Actinide wikiPageExternalLink 96B05654.html.
- Actinide wikiPageExternalLink search=%22actinide%20series%22.
- Actinide wikiPageID "2308".
- Actinide wikiPageRevisionID "604745607".
- Actinide hasPhotoCollection Actinide.
- Actinide mark "actinide".
- Actinide title "Actinides in the periodic table".
- Actinide subject Category:Actinides.
- Actinide subject Category:Periodic_table.
- Actinide comment "The actinide /ˈæktɨnaɪd/ or actinoid /ˈæktɨnɔɪd/ (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.The actinide series derives its name from the group 3 element actinium. The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide.".
- Actinide label "Actinide".
- Actinide label "Actinide".
- Actinide label "Actinide".
- Actinide label "Actinoide".
- Actinide label "Actinídeo".
- Actinide label "Actínido".
- Actinide label "Aktynowce".
- Actinide label "Attinoidi".
- Actinide label "Актиноиды".
- Actinide label "أكتينيدات".
- Actinide label "アクチノイド".
- Actinide label "锕系元素".
- Actinide sameAs Aktinoidy.
- Actinide sameAs Actinoide.
- Actinide sameAs Ακτινίδες.
- Actinide sameAs Actínido.
- Actinide sameAs Aktinoide.
- Actinide sameAs Actinide.
- Actinide sameAs Aktinida.
- Actinide sameAs Attinoidi.
- Actinide sameAs アクチノイド.
- Actinide sameAs 악티늄족.
- Actinide sameAs Actinide.
- Actinide sameAs Aktynowce.
- Actinide sameAs Actinídeo.
- Actinide sameAs m.0yf5.
- Actinide sameAs Q19577.
- Actinide sameAs Q19577.
- Actinide wasDerivedFrom Actinide?oldid=604745607.
- Actinide depiction Nagasakibomb.jpg.
- Actinide isPrimaryTopicOf Actinide.
