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(B) The alkaline earth metals are the elements belonging to Group $2$ of the periodic table.These elements have a general valence shell electronic con

Vedclass · Accepted Answer

$Sr$

Vedclass · Answer

(B) The alkaline earth metals are the elements belonging to Group $2$ of the periodic table.These elements have a general valence shell electronic configuration of $ns^2$.Among the given options:$Rb$ $(Rubidium)$ and $Cs$ $(Cesium)$ belong to Group $1$ (Alkali metals).$Fr$ $(Francium)$ also belongs to Group $1$ (Alkali metals).$Sr$ $(Strontium)$ belongs to Group $2$ (Alkaline earth metals).Therefore,the correct option is $B$.

Identify the alkaline earth metal from the following.

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