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| {{short description|large-cell versions of the periodic table}} | |||
| {{sidebar periodic table}} | |||
| The ] is a ] method of displaying the ]s. It can show much information, after name, symbol and atomic number. Also, for each element mean ] value for the natural isotopic composition of each element can be noted. | |||
| The two layout forms originate from two graphic forms of presentation of the same periodic table. Historically, when the ] was identified it was drawn below the existing table, with markings for its in-table location (this page uses dots or asterisks). Also, a common presentation is to put all 15 lanthanide and actinide columns below, while the f-block only has 14 columns. One lanthanide and actinide each are ] elements, belonging to ] with ] and ], though whether these are the first of each series (] and ]) or the last (] and ]) has been disputed. The tables below show lanthanum and actinium as group 3 elements, as this is the more common form in the literature. | |||
| {{R with history}} | |||
| Although precursors to this table exist, its invention is generally credited to ]n ] ] in 1869. Mendeleev invented the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.<ref>{{cite news|author= |title=The periodic table of the elements |publisher=] |date=2007-07-22 |url=http://www.iupac.org/didac/Didac%20Eng/Didac01/Content/S01.htm |accessdate=2008-02-08 |deadurl=yes |archiveurl=https://web.archive.org/web/20080213082719/http://www.iupac.org/didac/Didac%20Eng/Didac01/Content/S01.htm |archivedate=2008-02-13 |df= }}</ref> | |||
| __NOTOC__ | |||
| {| id="toc" class="toc" style="float:left; margin:auto; text-align:center; vertical-align:top" | |||
| |+ | |||
| ! Contents | |||
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| | style="text-align:left"| ] | |||
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| | style="vertical-align:top; padding-left:2em; float:left" | ] | |||
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| | style="text-align:left"| ] | |||
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| | style="vertical-align:top; padding-left:2em; float:left;" | ] | |||
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| | style="text-align:left"| ] | |||
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| | style="text-align:left"| ] {{nbsp|2}} | |||
| |}{{clear}} | |||
| ==<span id="18-column">18-column layout</span>== | |||
| {{Periodic table (18 columns, large cells)}} | |||
| ==<span id="32-column">32-column layout</span>== | |||
| {{Periodic table (32 columns, large cells)}} | |||
| == References == | |||
| === Citations === | |||
| {{Reflist}} | |||
| === Sources === | |||
| {{refbegin}} | |||
| * (Retrieved 15 October 2017) | |||
| * (Retrieved 20 June 2005) | |||
| * ''Atomic Weights of the Elements 2001'', | |||
| * (2005). | |||
| * | |||
| {{refend}} | |||
| {{-}} | |||
| {{Navbox periodic table}} | |||
| ⚫ | ] | ||
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