Which other elements belong to Group 13 with boron?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

A labeled diagram of the periodic table entry for boron shows its atomic number 5, symbol B, electron configuration, atomic weight range, and classification as a solid, weakly acidic, other nonmetal with a rhombohedral crystal structure at room temperature. — boron Properties of boron.

In addition to boron, the elements that constitute Group 13 of the periodic table are:

Aluminum (Al)
Gallium (Ga)
Indium (In)
Thallium (Tl)
Nihonium (Nh)

These elements are collectively known as the boron group. They are characterized by having three electrons in the outermost part of their atomic structure. While boron is classified as a metalloid, aluminum, gallium, indium, and thallium are silvery-white metals, and nihonium has been produced only as individual atoms in particle accelerators.1