The noble gases have stable electron configurations.
Solutions are mixtures of one or more solutes dissolved in a solvent. They do not have electron configurations. Only atoms and ions have electron configurations.
All of the representative elements (s and p block) have predictable electron configurations. However, many of the transition elements have electron configurations that are not predicted by the rules for determining electron configuration.
condensed electron configuration of krypton
The electron configuration of argon is [Ne]3s23p6.
The electron configuration of sulfur is [Ne]3s2.3p4.
Long way: 1s2 2s2 2p6 3s1Short way: [Ne] 3s1
Stable electron configurations are those of the noble gases in group 18. Atoms undergo chemical bonding in order to obtain noble gas configurations, which makes them stable.
The externall shell of electrons is completely filled.