Periode-1-element: verschil tussen versies

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| [[Periode-7-element|Periode 7]]: [Rn]5f6d7s
|}
E '''periode-1-element''' is e [[chemisch element]] in d' êeste reke (of [[Periode (periodiek système)|periode]]) van 't [[periodiek système]]. Die element'n kenmerk'n under deurdat allêene moa d' 1s-schelle elektroonn bevat. Omdat die schelle maximoal twêe elektroonn kan hen, zyn der in die êeste periode moa twêe element'n:
{| bd=1 cp=0 cs=1 style="border-style:none;border-width:0px"
 
{| bd=1 cp=0 cs=1 style="border-style:none;border-width:0px"
|-
|align=center valign=bottom width=32 style="border-style:solid; border-width:2px; border-color:#888; background: #bf7e7ff8f" | <font size=1>1</font><br />[[Woaterstoffe|H]]
|align=center valign=bottom width=32 | &nbsp;
|align=center valign=bottom width=32 | &nbsp;
|align=center valign=bottom width=32 style="border-style:solid; border-width:2px; border-color:#888; background:#7fbc0ffff" | <font size=1>2</font><br />[[Helium|He]]
|}
== Element'n ==
 
{| class="wikitable"
Legenda<br />
{|-
! colspan="3" | [[Chemisch element]] !! [[Groep (periodieke tabelle)|Groep]] !! [[Elektronconfiguroatie]]
|style="background:#bbff77; border-style:solid; border-width:2px; border-color:#888888;" | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|- style="borderbackground-stylecolor:none #e7ff8f" |=Niet-metoaln
| 1 || '''H''' || [[Woaterstoffe]] || Niet-metoal || 1s<sup>1</sup>
|style="background:#77ffbb; border-style:solid; border-width:2px; border-color:#888888;" | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
|- style="borderbackground-stylecolor:none" |=Edelgassn#c0ffff"
| 2 || '''He''' || [[Helium]] || Edelgaze || 1s<sup>2</sup>
|}
<gallery widths="100" heights="100">
Ofbeeldienge: Electron shell 001 Hydrogen (diatomic nonmetal) - no label.svg|<center>Woaterstoffe
Ofbeeldienge: Electron shell 002 Helium - no label.svg|<center>Helium
</gallery>
 
[[Categorie:Chemisch element]]
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