Write the electronic configuration of the 1st and 2nd groups.
Understand the Problem
The question is asking for the electronic configurations of the elements in the 1st and 2nd groups of the periodic table. This includes information on how electrons are distributed among the various atomic orbitals for these groups.
Answer
Group 1: ns^1, Group 2: ns^2.
The electronic configuration of Group 1 elements (alkali metals) is characterized by having one electron in their outermost s-orbital; their configurations end in "ns^1". Group 2 elements (alkaline earth metals) end in "ns^2", having two electrons in the outermost s-orbital.
Answer for screen readers
The electronic configuration of Group 1 elements (alkali metals) is characterized by having one electron in their outermost s-orbital; their configurations end in "ns^1". Group 2 elements (alkaline earth metals) end in "ns^2", having two electrons in the outermost s-orbital.
More Information
Group 1 and Group 2 elements belong to the s-block of the periodic table, where the outermost electrons occupy s orbitals.
Tips
A common mistake is to forget the increasing principal quantum number (n) as you move down periods in the table.
Sources
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