View source for Chemistry:Periodic table (large cells)

{{short description|large-cell versions of the periodic table}}
{{sidebar periodic table}}
The '''[[Chemistry:Periodic table|periodic table]]''' is a [[Table (information)|tabular]] method of displaying the [[Chemistry:Chemical element|chemical element]]s. It can show much information, after name, symbol and atomic number. Also, for each element mean [[Physics:Atomic mass|atomic mass]] 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 f-block 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 d-block elements, belonging to [[Chemistry:Group 3 element|group 3]] with [[Chemistry:Scandium|scandium]] and [[Chemistry:Yttrium|yttrium]], though whether these are the first of each series ([[Chemistry:Lanthanum|lanthanum]] and [[Chemistry:Actinium|actinium]]) or the last ([[Chemistry:Lutetium|lutetium]] and [[Chemistry:Lawrencium|lawrencium]]) has been disputed. The tables below show lanthanum and actinium as group 3 elements, as this is the more common form in the literature.

Although precursors to this table exist, its invention is generally credited to {{wipe|Russia}}n [[Chemist|chemist]] [[Biography:Dmitri Mendeleev|Dmitri Mendeleev]] 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=[[Organization:International Union of Pure and Applied Chemistry|International Union of Pure and Applied Chemistry]] |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>
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! Contents
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| style="text-align:left"| [[Chemistry:Periodic table (large cells)#18-column|18-column layout]]
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| style="vertical-align:top; padding-left:2em; float:left" | [[File:Periodic table overview (18-columns, group 3 = Sc-Y-La-Ac).svg|none|x67px|Periodic table with f-block separated|link=Periodic table (large cells)#18-column]]
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| style="text-align:left"| [[Chemistry:Periodic table (large cells)#32-column|32-column layout]]
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| style="vertical-align:top; padding-left:2em; float:left;" | [[File:Periodic Table overview (wide).svg|none|x50px|link=Periodic table (large cells)#32-column]]
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| style="text-align:left"| [[Chemistry:Periodic table (large cells)#References|References]]
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| style="text-align:left"| [[Chemistry:Periodic table (large cells)#Notes|Notes]] {{nbsp|2}}
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==<span id="18-column">18-column layout</span>==
{{Periodic table (18 columns, large cells)}}

==<span id="32-column">32-column layout</span>==

==References==
{{refbegin}}
* [https://iupac.org/what-we-do/periodic-table-of-elements/ IUPAC periodic table] (Retrieved 15 October 2017)
* [http://www.webelements.com/ WebElements Periodic table (professional edition)] (Retrieved 20 June 2005)
* ''Atomic Weights of the Elements 2001'', [http://www.iupac.org/publications/pac/2003/7508/7508x1107.html Pure Appl. Chem. 75(8), 1107–1122, 2003]
* [http://www.iupac.org/news/archives/2005/atomic-weights_revised05.html IUPAC Standard Atomic Weights Revised] (2005).
* [http://media.iupac.org/publications/books/gbook/IUPAC-GB3-2ndPrinting-Online-22apr2011.pdf IUPAC Quantities, Units and Symbols in Physical Chemistry Third Edition]
{{refend}}

==Notes==
{{reflist}}

{{Navbox periodic table}}

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[[Category:Periodic table| ]]

{{Sourceattribution|Periodic table (large cells)|1}}