Twelve icosahedra in which each boron atom has 5 closest neighbors inside the icosahedron. In case the bonding ended up the traditional covalent variety then Just about every boron might have donated five electrons. On the other hand, boron has only three valence electrons, and it is assumed that the https://jobboard.militarytimes.com/employers/ec8be146-4aa6-46c0-bac2-7d9d1296a8d3/edit