Periodic table (block)

Helium is placed next to hydrogen instead of on top of neon because it is part of the s2 group. In addition to the blocks listed in this table, there is a hypothetical g-block which is not pictured here. g-block elements can be seen in the expanded extended periodic table.

جدول دوري (مستويات فرعية) 주기율표 (구역별) Jadual berkala (blok) ตารางธาตุ (บล็อก)