Group 7 of the Periodic Table
Group 7 of the periodic table has 4 elements: Manganese, Technetium, Rhenium and Bohrium. Elements in a group have a similar last electron shell; the outer-shell pattern of all of them is ns², 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 |
|---|---|---|---|---|---|
| 25 | Mn | Manganese | 54.938 | Solid | [Ar] 3d⁵ 4s² |
| 43 | Tc | Technetium | 98 | Solid | [Kr] 4d⁵ 5s² |
| 75 | Re | Rhenium | 186.21 | Solid | [Xe] 4f¹⁴ 5d⁵ 6s² |
| 107 | Bh | Bohrium | 270 | Solid (a theoretical prediction) | [Rn] 5f¹⁴ 6d⁵ 7s² |
Frequently asked questions
What are the group 7 elements of the periodic table?
The group 7 elements are Manganese (Mn), Technetium (Tc), Rhenium (Re) and Bohrium (Bh).
How many elements are in group 7?
Group 7 of the periodic table has 4 elements (excluding the lanthanides and actinides).