colspan="2" style="text-align:left; line-height:normal; border:2px solid transparent; margin-left:2em; padding:2px 0 0 1.5em; background-color:#f0f0f0;" | →element name atomic number chemical symbol
Column counts are columns only that contain elements. "Compact cells" denote cells with element symbol only, have navbox style and the table fits basic wiki page width (1024×768). "Detailed cells" have more data, and may cause page width excess (scroll bar added). "Extended" periodic tables are about theoretical periods 8 and higher (element 119 and higher).