Template:Infobox periodic table group/header/sandbox

{| class="infobox" style="text-align:center; border:1px solid ; background:; padding:2px; width:1em;" ! colspan=2 style="text-align:center; background:;" |
 * colspan=2 style="text-align:center; width:1em; margin-top:1px; background:transparent; border:1px solid ;" |
 * colspan=2 |
 * colspan=2 |
 * colspan=2 |