The noble gas configurations for
Li= [He] 2s¹, Na=[Ne] 3s¹ and K =[Ar] 4s¹.
Noble gas configurations are the term for the electronic configurations of the atoms for which the electronic configuration becomes very larger i.e, for the higher atomic numbers.
For the noble gas electronic configurations, the noble gas, which is before that atom is written.
So, the Lithium can be represented as [He] 2s¹.
So, the Sodium can be represented as [Ne] 3s¹.
So, the Potassium can be represented as [Ar] 4s¹.
Hence, the noble gas configurations for Lithium= [He] 2s¹, Sodium=[Ne] 3s¹ and potassium =[Ar] 4s¹.
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