Statement A: Helium and Beryllium have the sa | vedclass

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(C) Helium $(Z = 2)$ has the electronic configuration $1s^2$.Beryllium $(Z = 4)$ has the electronic configuration $1s^2 \, 2s^2$.Both elements have an

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Statement $A$ is true,but Reason $R$ is false.

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(C) Helium $(Z = 2)$ has the electronic configuration $1s^2$.Beryllium $(Z = 4)$ has the electronic configuration $1s^2 \, 2s^2$.Both elements have an $ns^2$ outer shell configuration,so Statement $A$ is true.Helium is a noble gas and is chemically inert due to its stable filled shell,whereas Beryllium is a reactive alkaline earth metal that can form compounds by utilizing its $2s$ and $2p$ orbitals. Therefore,Reason $R$ is false.

Statement $A$: Helium and Beryllium have the same outer electronic configuration of the type $ns^2$.
Reason $R$: Both are chemically inert.

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Statement $A$: Helium and Beryllium have the same outer electronic configuration of the type $ns^2$.Reason $R$: Both are chemically inert.