Group 13 of the Periodic Table
Group 13 of the periodic table (Boron group) has 6 elements: Boron, Aluminum, Gallium, Indium, Thallium and Nihonium. 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 |
|---|---|---|---|---|---|
| 5 | B | Boron | 10.81 | Solid | [He] 2s² 2p¹ |
| 13 | Al | Aluminum | 26.982 | Solid | [Ne] 3s² 3p¹ |
| 31 | Ga | Gallium | 69.723 | Solid | [Ar] 3d¹⁰ 4s² 4p¹ |
| 49 | In | Indium | 114.82 | Solid | [Kr] 4d¹⁰ 5s² 5p¹ |
| 81 | Tl | Thallium | 204.38 | Solid | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p¹ |
| 113 | Nh | Nihonium | 286 | Solid (a theoretical prediction) | [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p¹ |
Frequently asked questions
What are the group 13 elements of the periodic table?
The group 13 elements are Boron (B), Aluminum (Al), Gallium (Ga), Indium (In), Thallium (Tl) and Nihonium (Nh).
How many elements are in group 13?
Group 13 of the periodic table has 6 elements (excluding the lanthanides and actinides).