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	<title>Template:Periodic table (group names) - Revision history</title>
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	<updated>2026-06-15T07:27:49Z</updated>
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		<updated>2023-05-17T11:42:46Z</updated>

		<summary type="html">&lt;p&gt;1 revision imported from &lt;a href=&quot;https://alpha.indicwiki.in/index.php?title=Template:Periodic_table_(group_names)&quot; class=&quot;extiw&quot; title=&quot;alpha:Template:Periodic table (group names)&quot;&gt;alpha:Template:Periodic_table_(group_names)&lt;/a&gt;&lt;/p&gt;
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				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 17:12, 17 May 2023&lt;/td&gt;
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		<author><name>Indicwiki</name></author>
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		<title>alpha&gt;Indicwiki: Created page with &quot;&lt;div class=&quot;mw-collapsible {{#ifeq:{{{state|}}}|collapsed|mw-collapsed|{{{state|uncollapsed}}}}}&quot; style=&quot;background:{{element color|table background}}; font-size:85%; border:1...&quot;</title>
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		<updated>2023-04-25T11:05:35Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;lt;div class=&amp;quot;mw-collapsible {{#ifeq:{{{state|}}}|collapsed|mw-collapsed|{{{state|uncollapsed}}}}}&amp;quot; style=&amp;quot;background:{{element color|table background}}; font-size:85%; border:1...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;lt;div class=&amp;quot;mw-collapsible {{#ifeq:{{{state|}}}|collapsed|mw-collapsed|{{{state|uncollapsed}}}}}&amp;quot; style=&amp;quot;background:{{element color|table background}}; font-size:85%; border:1px solid {{element color|table border}}; width:100%; margin:0 auto; padding:2px; text-align:center; vertical-align:top;&amp;quot;&amp;gt;&lt;br /&gt;
&amp;lt;div style=&amp;quot;background:{{element color|table title}}; padding:2px 4px;font-weight:bold;&amp;quot;&amp;gt;{{#invoke:navbar|navbar|collapsible=1|Groups in the [[periodic table]]}}&amp;lt;/div&amp;gt;&amp;lt;!--&lt;br /&gt;
&lt;br /&gt;
--&amp;gt;&amp;lt;div class=&amp;quot;mw-collapsible-content&amp;quot;&amp;gt;&lt;br /&gt;
{| border=&amp;quot;0&amp;quot; cellpadding=&amp;quot;0&amp;quot; cellspacing=&amp;quot;2&amp;quot; style=&amp;quot;display:block;overflow:auto;width:100%;text-align:center; max-width:1300px; margin:0; padding:0;&amp;quot;&lt;br /&gt;
|- style=&amp;quot;line-height:120%; vertical-align:top;&amp;quot;&lt;br /&gt;
| style=&amp;quot;text-align:left;&amp;quot; | [[Group (periodic table)|IUPAC group]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | {{#ifeq:{{PAGENAME}}|Group (periodic table)|[[#Group 1{{!}}1]]|[[Group 1 element{{!}}1]]}}{{ref|group1|a}}&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Alkaline earth metal|2]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | &amp;amp;mdash;{{ref|f-block groups|b}}&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Group 3 element|3]]{{ref|ScYLu|c}}&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Group 4 element|4]]&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Group 5 element|5]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Group 6 element|6]]&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Group 7 element|7]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Group 8 element|8]]&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Group 9 element|9]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Group 10 element|10]]&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Group 11 element|11]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Group 12 element|12]]&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Boron group|13]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Carbon group|14]]&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Pnictogen|15]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Chalcogen|16]]&lt;br /&gt;
! style=&amp;quot;background:#f1f1f1;&amp;quot; | [[Halogen|17]]&lt;br /&gt;
! style=&amp;quot;background:#e1e1e1;&amp;quot; | [[Noble gas|18]]&lt;br /&gt;
&lt;br /&gt;
|- style=&amp;quot;line-height:120%; vertical-align:top;&amp;quot;&lt;br /&gt;
| style=&amp;quot;vertical-align:top; text-align:left;&amp;quot; | [[Dmitri_Mendeleev#Periodic_table|Mendeleev]] {{nowrap|&amp;lt;small&amp;gt;(I&amp;amp;ndash;VIII)&amp;lt;/small&amp;gt;}}&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | I&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;A&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | II&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;A&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | III&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IV&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | V&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | VI&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VII&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| colspan=3 style=&amp;quot;background:#e1e1e1; border-top:1px solid #b8b8b8; text-align:center;&amp;quot; | VIII{{0|B}}&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | I&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | II&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | III&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IV&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | V&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | VI&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VII&amp;lt;span style=&amp;quot;visibility:hidden&amp;quot;&amp;gt;B&amp;lt;/span&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | {{ref|group0|d}}&lt;br /&gt;
&lt;br /&gt;
|- style=&amp;quot;line-height:120%; vertical-align:top;&amp;quot;&lt;br /&gt;
| style=&amp;quot;text-align:left; vertical-align:top;&amp;quot; | [[Group (periodic table)#CAS and old IUPAC|CAS]] &amp;lt;small&amp;gt;{{nowrap|(US, A-B-A)}}&amp;lt;/small&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IA&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IIA&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IIIB&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IVB&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VB&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | VIB&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VIIB&lt;br /&gt;
| colspan=3 style=&amp;quot;background:#e1e1e1; border-top:1px solid #b8b8b8;&amp;quot; | VIIIB&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IB&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IIB&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IIIA&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IVA&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VA&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | VIA&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VIIA&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | VIIIA&lt;br /&gt;
&lt;br /&gt;
|- style=&amp;quot;line-height:120%; vertical-align:top;&amp;quot;&lt;br /&gt;
| style=&amp;quot;text-align:left;&amp;quot; | [[Group (periodic table)#CAS and old IUPAC|Old&amp;amp;nbsp;IUPAC]] &amp;lt;small&amp;gt;{{nowrap|(Europe, A-B)}}&amp;lt;/small&amp;gt;&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IA&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IIA&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IIIA&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IVA&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VA&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | VIA&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VIIA&lt;br /&gt;
| colspan=3 style=&amp;quot;background:#e1e1e1; border-top:1px solid #b8b8b8;&amp;quot; | VIII{{0|B}}&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IB&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IIB&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | IIIB&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | IVB&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VB&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | VIB&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | VIIB&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1; font-size:95%;&amp;quot; | 0&lt;br /&gt;
&lt;br /&gt;
|- style=&amp;quot;line-height:120%; vertical-align:top;&amp;quot;&lt;br /&gt;
| style=&amp;quot;text-align:left;&amp;quot; | [[Trivial name]]{{ref|IUPAC|r}}&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | H and [[alkali metal]]s&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | [[alkaline earth metal]]s&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | &lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | [[boron group|triels]]&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | [[carbon group|tetrels]]&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | [[pnictogens|pnicto{{shy}}gens]]&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | [[chalcogens|chal{{shy}}co{{shy}}gens]]&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | [[halogens|halo{{shy}}gens]]&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | [[noble gases]]&lt;br /&gt;
&lt;br /&gt;
|- style=&amp;quot;line-height:120%; vertical-align:top;&amp;quot;&lt;br /&gt;
| style=&amp;quot;text-align:left;&amp;quot; | Name by element{{ref|IUPAC|r}}&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | lith{{shy}}ium group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | beryl{{shy}}lium group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | scan{{shy}}dium group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | titan{{shy}}ium group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | vana{{shy}}dium group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | chro{{shy}}mium group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | man{{shy}}ga{{shy}}nese group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | iron group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | co{{shy}}balt group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | nickel group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | cop{{shy}}per group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | zinc group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | boron group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | car{{shy}}bon group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | nitro{{shy}}gen group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | oxy{{shy}}gen group&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; | fluor{{shy}}ine group&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; | helium ''or'' neon group&lt;br /&gt;
&lt;br /&gt;
|-&lt;br /&gt;
| style=&amp;quot;text-align:right; padding-right:1em;&amp;quot; | [[Period 1 element|Period 1]]&lt;br /&gt;
| {{element cell||Hydrogen|{{nbsp}}H{{nbsp}}|6=s-block}}&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| {{element cell||Helium|He|6=s-block}}&lt;br /&gt;
|-&lt;br /&gt;
| style=&amp;quot;text-align:right; padding-right:1em;&amp;quot; | [[Period 2 element|Period 2]]&lt;br /&gt;
| {{element cell||Lithium|Li|6=s-block}}&lt;br /&gt;
| {{element cell||Beryllium|Be|6=s-block}}&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| {{element cell||Boron|B|6=p-block}}&lt;br /&gt;
| {{element cell||Carbon|C|6=p-block}}&lt;br /&gt;
| {{element cell||Nitrogen|N|6=p-block}}&lt;br /&gt;
| {{element cell||Oxygen|O|6=p-block}}&lt;br /&gt;
| {{element cell||Fluorine|F|6=p-block}}&lt;br /&gt;
| {{element cell||Neon|Ne|6=p-block}}&lt;br /&gt;
|-&lt;br /&gt;
| style=&amp;quot;text-align:right; padding-right:1em;&amp;quot; | [[Period 3 element|Period 3]]&lt;br /&gt;
| {{element cell||Sodium|Na|6=s-block}}&lt;br /&gt;
| {{element cell||Magnesium|Mg|6=s-block}}&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#f1f1f1;&amp;quot; |&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| {{element cell||Aluminium|Al|6=p-block}}&lt;br /&gt;
| {{element cell||Silicon|Si|6=p-block}}&lt;br /&gt;
| {{element cell||Phosphorus|P|6=p-block}}&lt;br /&gt;
| {{element cell||Sulfur|S|6=p-block}}&lt;br /&gt;
| {{element cell||Chlorine|Cl|6=p-block}}&lt;br /&gt;
| {{element cell||Argon|Ar|6=p-block}}&lt;br /&gt;
|-&lt;br /&gt;
| style=&amp;quot;text-align:right; padding-right:1em;&amp;quot; | [[Period 4 element|Period 4]]&lt;br /&gt;
| {{element cell||Potassium|K|6=s-block}}&lt;br /&gt;
| {{element cell||Calcium|Ca|6=s-block}}&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1;&amp;quot; |&lt;br /&gt;
| {{element cell||Scandium|Sc|6=d-block}}&lt;br /&gt;
| {{element cell||Titanium|Ti|6=d-block}}&lt;br /&gt;
| {{element cell||Vanadium|V|6=d-block}}&lt;br /&gt;
| {{element cell||Chromium|Cr|6=d-block}}&lt;br /&gt;
| {{element cell||Manganese|Mn|6=d-block}}&lt;br /&gt;
| {{element cell||Iron|Fe|6=d-block}}&lt;br /&gt;
| {{element cell||Cobalt|Co|6=d-block}}&lt;br /&gt;
| {{element cell||Nickel|Ni|6=d-block}}&lt;br /&gt;
| {{element cell||Copper|Cu|6=d-block}}&lt;br /&gt;
| {{element cell||Zinc|Zn|6=d-block}}&lt;br /&gt;
| {{element cell||Gallium|Ga|6=p-block}}&lt;br /&gt;
| {{element cell||Germanium|Ge|6=p-block}}&lt;br /&gt;
| {{element cell||Arsenic|As|6=p-block}}&lt;br /&gt;
| {{element cell||Selenium|Se|6=p-block}}&lt;br /&gt;
| {{element cell||Bromine|Br|6=p-block}}&lt;br /&gt;
| {{element cell||Krypton|Kr|6=p-block}}&lt;br /&gt;
|-&lt;br /&gt;
| style=&amp;quot;text-align:right; padding-right:1em;&amp;quot; | [[Period 5 element|Period 5]]&lt;br /&gt;
| {{element cell||Rubidium|Rb|6=s-block}}&lt;br /&gt;
| {{element cell||Strontium|Sr|6=s-block}}&lt;br /&gt;
| style=&amp;quot;background:#e1e1e1; &amp;lt;!--border-bottom:1px solid black--&amp;gt;&amp;quot; | &lt;br /&gt;
| {{element cell||Yttrium|Y|6=d-block}}&lt;br /&gt;
| {{element cell||Zirconium|Zr|6=d-block}}&lt;br /&gt;
| {{element cell||Niobium|Nb|6=d-block}}&lt;br /&gt;
| {{element cell||Molybdenum|Mo|6=d-block}}&lt;br /&gt;
| {{element cell||Technetium|Tc|6=d-block}}&lt;br /&gt;
| {{element cell||Ruthenium|Ru|6=d-block}}&lt;br /&gt;
| {{element cell||Rhodium|Rh|6=d-block}}&lt;br /&gt;
| {{element cell||Palladium|Pd|6=d-block}}&lt;br /&gt;
| {{element cell||Silver|Ag|6=d-block}}&lt;br /&gt;
| {{element cell||Cadmium|Cd|6=d-block}}&lt;br /&gt;
| {{element cell||Indium|In|6=p-block}}&lt;br /&gt;
| {{element cell||Tin|Sn|6=p-block}}&lt;br /&gt;
| {{element cell||Antimony|Sb|6=p-block}}&lt;br /&gt;
| {{element cell||Tellurium|Te|6=p-block}}&lt;br /&gt;
| {{element cell||Iodine|I|6=p-block}}&lt;br /&gt;
| {{element cell||Xenon|Xe|6=p-block}}&lt;br /&gt;
|-&lt;br /&gt;
| style=&amp;quot;text-align:right; padding-right:1em;&amp;quot; | [[Period 6 element|Period 6]]&lt;br /&gt;
| {{element cell||Caesium|Cs|style=min-width:4%;|6=s-block}}&lt;br /&gt;
| {{element cell||Barium|Ba|style=min-width:4%;|6=s-block}}&lt;br /&gt;
| style=&amp;quot;font-size:95%; background:{{element color|f-block}}; padding:0 1px; width:*;&amp;quot; | {{nowrap|[[Lanthanide|La&amp;amp;ndash;Yb]]}}&lt;br /&gt;
| {{element cell||Lutetium|Lu|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Hafnium|Hf|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Tantalum|Ta|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Tungsten|W|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Rhenium|Re|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Osmium|Os|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Iridium|Ir|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Platinum|Pt|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Gold|Au|style=min-width:4%;|6=d-block}}&lt;br /&gt;
| {{element cell||Mercury|Hg|style=min-width:4%;|6=d-block|link=mercury (element)}}&lt;br /&gt;
| {{element cell||Thallium|Tl|style=min-width:4%;|6=p-block}}&lt;br /&gt;
| {{element cell||Lead|Pb|style=min-width:4%;|6=p-block}}&lt;br /&gt;
| {{element cell||Bismuth|Bi|style=min-width:4%;|6=p-block}}&lt;br /&gt;
| {{element cell||Polonium|Po|style=min-width:4%;|6=p-block}}&lt;br /&gt;
| {{element cell||Astatine|At|style=min-width:4%;|6=p-block}}&lt;br /&gt;
| {{element cell||Radon|Rn|style=min-width:4%;|6=p-block}}&lt;br /&gt;
|-&lt;br /&gt;
| style=&amp;quot;text-align:right; padding-right:1em;&amp;quot; | [[Period 7 element|Period 7]]&lt;br /&gt;
| {{element cell||Francium|Fr|6=s-block}}&lt;br /&gt;
| {{element cell||Radium|Ra|6=s-block}}&lt;br /&gt;
| style=&amp;quot;font-size:95%; background:{{element color|f-block}}; padding:0 1px;&amp;quot; | {{nowrap|[[Actinide|Ac&amp;amp;ndash;No]]}}&lt;br /&gt;
| {{element cell||Lawrencium|Lr|6=d-block}}&lt;br /&gt;
| {{element cell||Rutherfordium|Rf|6=d-block}}&lt;br /&gt;
| {{element cell||Dubnium|Db|6=d-block}}&lt;br /&gt;
| {{element cell||Seaborgium|Sg|6=d-block}}&lt;br /&gt;
| {{element cell||Bohrium|Bh|6=d-block}}&lt;br /&gt;
| {{element cell||Hassium|Hs|6=d-block}}&lt;br /&gt;
| {{element cell||Meitnerium|Mt|6=d-block}}&lt;br /&gt;
| {{element cell||Darmstadtium|Ds|6=d-block}}&lt;br /&gt;
| {{element cell||Roentgenium|Rg|6=d-block}}&lt;br /&gt;
| {{element cell||Copernicium|Cn|6=d-block}}&lt;br /&gt;
| {{element cell||Nihonium|Nh|6=p-block}}&lt;br /&gt;
| {{element cell||Flerovium|Fl|6=p-block}}&lt;br /&gt;
| {{element cell||Moscovium|Mc|6=p-block}}&lt;br /&gt;
| {{element cell||Livermorium|Lv|6=p-block}}&lt;br /&gt;
| {{element cell||Tennessine|Ts|6=p-block}}&lt;br /&gt;
| {{element cell||Oganesson|Og|6=p-block}}&lt;br /&gt;
|}&lt;br /&gt;
&amp;lt;div style=&amp;quot;text-align:left; background:{{element color|table mark}}&amp;quot;&amp;gt;&amp;lt;!--&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
--&amp;gt;{{Anchor|Group 1b}}{{note label|group1|a}} Group 1 is composed of hydrogen (H) and the alkali metals. Elements of the group have one s-electron in the outer electron shell. Hydrogen is not considered to be an alkali metal as it is not a metal, though it is more analogous to them than any other group. This makes the group somewhat exceptional.&amp;lt;br/&amp;gt;&amp;lt;!--&lt;br /&gt;
--&amp;gt;{{note label|f-block groups|b}} The 14 [[f-block groups]] (columns) do not have a group number.&amp;lt;br/&amp;gt;&amp;lt;!--&lt;br /&gt;
--&amp;gt;{{note label|ScYLu|c}} The correct composition of group 3 is scandium (Sc), yttrium (Y), lutetium (Lu), and lawrencium (Lr), as shown here: this is endorsed by 1988&amp;lt;ref name=&amp;quot;Fluck&amp;quot;&amp;gt;{{cite journal |last1=Fluck |first1=E. |year=1988 |title=New Notations in the Periodic Table |journal=[[Pure and Applied Chemistry|Pure Appl. Chem.]] |volume=60 |pages=431–436|doi=10.1351/pac198860030431 |url=https://www.iupac.org/publications/pac/1988/pdf/6003x0431.pdf |access-date=24 March 2012 |issue=3 |s2cid=96704008 |url-status=live |archive-url=https://web.archive.org/web/20120325152951/https://www.iupac.org/publications/pac/1988/pdf/6003x0431.pdf |archive-date=25 March 2012}}&amp;lt;/ref&amp;gt; and 2021&amp;lt;ref name=&amp;quot;2021IUPAC&amp;quot;&amp;gt;{{cite journal |last1=Scerri |first1=Eric |date=18 January 2021 |title=Provisional Report on Discussions on Group 3 of the Periodic Table |url=https://iupac.org/wp-content/uploads/2021/04/ChemInt_Jan2021_PP.pdf |journal=Chemistry International |volume=43 |issue=1 |pages=31–34 |doi=10.1515/ci-2021-0115 |s2cid=231694898 |access-date=9 April 2021 |archive-date=13 April 2021 |archive-url=https://web.archive.org/web/20210413150110/https://iupac.org/wp-content/uploads/2021/04/ChemInt_Jan2021_PP.pdf |url-status=live }}&amp;lt;/ref&amp;gt; IUPAC reports on the question. General inorganic chemistry texts often put scandium (Sc), yttrium (Y), lanthanum (La), and actinium (Ac) in group 3, so that Ce–Lu and Th–Lr become the f-block between groups 3 and 4; this was based on incorrectly measured electron configurations from history,&amp;lt;ref name=&amp;quot;Jensen1982&amp;quot;&amp;gt;{{cite journal |title=The Positions of Lanthanum (Actinium) and Lutetium (Lawrencium) in the Periodic Table |author=William B. Jensen |journal=J. Chem. Educ. |year=1982 |volume=59 |issue = 8|pages=634–636 |doi=10.1021/ed059p634|bibcode=1982JChEd..59..634J }}&amp;lt;/ref&amp;gt; and [[Lev Landau]] and [[Evgeny Lifshitz]] already considered it incorrect in 1948.&amp;lt;ref name=Landau&amp;gt;{{cite book&lt;br /&gt;
 |author=[[Lev Landau|L. D. Landau]], [[Evgeny Lifshitz|E. M. Lifshitz]]&lt;br /&gt;
 |year=1958&lt;br /&gt;
 |title=Quantum Mechanics: Non-Relativistic Theory&lt;br /&gt;
 |edition=1st |volume=3&lt;br /&gt;
 |publisher=[[Pergamon Press]]&lt;br /&gt;
 |pages=256–7&lt;br /&gt;
}}&amp;lt;/ref&amp;gt; Arguments can still occasionally be encountered in the contemporary literature purporting to defend it, but most authors consider them logically inconsistent.&amp;lt;ref name=&amp;quot;Jensen2015&amp;quot;&amp;gt;{{cite journal |last1=Jensen |first1=William B. |date=2015 |title=The positions of lanthanum (actinium) and lutetium (lawrencium) in the periodic table: an update |url=https://link.springer.com/article/10.1007/s10698-015-9216-1 |journal=Foundations of Chemistry |volume=17 |issue= |pages=23–31 |doi=10.1007/s10698-015-9216-1 |s2cid=98624395 |access-date=28 January 2021 |archive-date=30 January 2021 |archive-url=https://web.archive.org/web/20210130011116/https://link.springer.com/article/10.1007/s10698-015-9216-1 |url-status=live }}&amp;lt;/ref&amp;gt;&amp;lt;ref name=Scerri2009&amp;gt;{{cite journal |last1=Scerri |first1=Eric |last2= |first2= |date=2009 |title=Which Elements Belong in Group 3? |url=https://pubs.acs.org/doi/pdf/10.1021/ed086p1188 |journal=Journal of Chemical Education |volume=86 |issue=10 |pages=1188 |doi=10.1021/ed086p1188 |access-date=1 January 2023}}&amp;lt;/ref&amp;gt;&amp;lt;ref name=Chemey&amp;gt;{{cite journal |last1=Chemey |first1=Alexander T. |last2=Albrecht-Schmitt |first2=Thomas E. |date=2019 |title=Evolution of the periodic table through the synthesis of new elements |url= |journal=Radiochimica Acta |volume=107 |issue=9–11 |pages=1–31 |doi=10.1515/ract-2018-3082 |access-date=}}&amp;lt;/ref&amp;gt; Some sources follow a compromise that puts La–Lu and Ac–Lr as the f-block rows (despite that giving 15 f-block elements in each row, which contradicts quantum mechanics), leaving the heavier members of group 3 ambiguous.&amp;lt;ref name=2021IUPAC/&amp;gt; See also [[Group 3 element#Composition]].&amp;lt;br/&amp;gt;&amp;lt;!--&lt;br /&gt;
--&amp;gt;{{note label|group0|d}} Group 18, the noble gases, were not discovered at the time of Mendeleev's original table. Later (1902), Mendeleev accepted the evidence for their existence, and they could be placed in a new &amp;quot;group 0&amp;quot;, consistently and without breaking the periodic table principle.&amp;lt;br/&amp;gt;&amp;lt;!--&lt;br /&gt;
--&amp;gt;{{note label|IUPAC|r}} Group name as recommended by IUPAC.&amp;lt;/div&amp;gt;&lt;br /&gt;
&amp;lt;/div&amp;gt;&amp;lt;/div&amp;gt;&amp;lt;!--&lt;br /&gt;
&lt;br /&gt;
--&amp;gt;&amp;lt;noinclude&amp;gt;{{documentation}}&amp;lt;/noinclude&amp;gt;&lt;/div&gt;</summary>
		<author><name>alpha&gt;Indicwiki</name></author>
	</entry>
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