______metals and alkaline _metals are placed in group I A and ______ respectively on the left hand side of the periodic table.

Alkali

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earth, II A

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Solution

Alkali metals are the elements that possess only one valence electron in their outermost shell. These metals are placed in Group IA of the periodic table.
Alkaline earth metals are metals that have two valence electrons in their outermost shell.
Alkali metals and alkaline earth metals are placed in group I A and II A respectively on the left hand side of the periodic table.
First group elements are called alkali metals and second group elements are called alkaline earth metals.
Therefore, alkali metals and alkaline earth metals are placed in group I A and II A respectively on the left hand side of the periodic table.

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