Group 8 of the Periodic Table

Group 8 of the periodic table has 4 elements: Iron, Ruthenium, Osmium and Hassium. Elements in a group have a similar last electron shell, so they show similar chemical properties. Moving down a group, the number of shells and the atomic radius usually increase.

Element list

Atomic no.	Symbol	Name	Atomic mass	Phase	Short configuration
26	Fe	Iron	55.845	Solid	[Ar] 3d⁶ 4s²
44	Ru	Ruthenium	101.07	Solid	[Kr] 4d⁷ 5s¹
76	Os	Osmium	190.23	Solid	[Xe] 4f¹⁴ 5d⁶ 6s²
108	Hs	Hassium	269	Solid (a theoretical prediction)	[Rn] 5f¹⁴ 6d⁶ 7s²

Frequently asked questions

What are the group 8 elements of the periodic table?

The group 8 elements are Iron (Fe), Ruthenium (Ru), Osmium (Os) and Hassium (Hs).

How many elements are in group 8?

Group 8 of the periodic table has 4 elements (excluding the lanthanides and actinides).