What is the ground state of cesium?

Cs I Ground State 1s22s22p63s23p63d104s24p64d105s25p66s 2S1/2. Ionization energy 31406.46769 cm-1 (3.893905 eV) Ref. WS87 Cs II Ground State 1s22s22p63s23p63d104s24p64d105s25p6 1S0. Ionization energy 186777.4 cm-1 (23.15744 eV) Ref. S81. read more

The ground state of Cesium, as with all alkali atoms (the ones that inhabit the first column of the Periodic Table) that have one electron beyond the filled shell of the noble gases, have two ground states. read more

The ground state electron configuration of ground state gaseous neutral caesium is [Xe].6s 1 and the term symbol is 2 S 1/2. Schematic electronic configuration of caesium. The Kossel shell structure of caesium. read more

When the cesium second was defined in 1967, it was based on a measurement of the number of cycles of the radiation from a particular cesium-133 transition with reference to the second commonly used in civilian timekeeping, which at that time was based on astronomical observations. read more