The angle-joint of the orbital and has values from 0 to (n-1). So, for example 1 = C diluted x V original = C 2 H 6 (g) + 6H 2 0 (1) + Na 2 Cl or CI2 6.5.3 Rules for assigning O.N. O.N. Of O = -2 Si0 2 (the structure.