Which block is used to offset the periodic table ?
Each block is named after its characteristic orbital ; thus , the blocks are : s - block p - block d - block f - block g - block ( hypothetical ) The block names ( s , p , d , f and g ) are derived from the quality of the spectroscopic lines of the associated atomic orbitals : sharp , principal , diffuse and fundamental , the rest being named in alphabetical order from g onwards , omitting j.