Elemental Groups

d-block f-block g-block p-block s-block Subgroups 1A (alkali metals) 2A (alkaline earth metals)

Groups 1A (alkali metals) and 2A (alkaline earth metals) of the periodic table, Hydrogen, and helium make up the S-block (for sharp) elements. These elements have noble gas structures.

An s orbital can hold a maximum of 2 electrons.