Coordination bond of tetraborate ion

The coordination bond of tetraborate ion is NH4. According to the relevant public information, the coordination bond of tetraborate ion is NH4, and the coordination bond is also called coordination * * * valence bond, which is a special * * * valence bond. When an electron pair used in a valence bond is provided by one of the atoms alone, it is called a coordination bond. After the coordination bond is formed, it is the same as the general valence bond. The two electrons enjoyed by two bonded atoms are not provided by each atom, but from one atom.