Gallium has three valence electrons.
This is because gallium is located in group 13 of the periodic table, which indicates that it has three electrons in its outermost shell. Valence electrons are important because they determine how an element reacts chemically and how it bonds with other elements. In the case of gallium, its three valence electrons allow it to form various compounds, often engaging in covalent bonding due to its ability to share electrons with other nonmetals.