Fluorine can form one bond. This is because fluorine has seven electrons in its outermost shell and needs one additional electron to achieve a stable octet configuration. By sharing one of its electrons with another atom, fluorine can complete its outer shell and form a covalent bond.
In most of its compounds, fluorine is found bonded to other elements such as hydrogen, carbon, or metals. The strong electronegativity of fluorine also means that when it forms a bond, it tends to pull the shared electrons closer to itself, making it one of the most reactive elements in the periodic table. Due to this high reactivity and its tendency to gain an electron rather than share more, fluorine typically does not form multiple bonds like some other elements do.