Context: The periodic table currently can be arranged into four "blocks": the S block (first two columns), the P block (last six columns, excluding Helium), the

Context: The periodic table currently can be arranged into four "blocks": the S block (first two columns), the P block (last six columns, excluding Helium), the D block (transition metals, in the center), and the F block (under the periodic table). The 121st element would end up in the G block, which isn't in any of these locations but rather gets its own special location.