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Which represents alkali metals (i.e., 1 group metals) based on $(IE)_{1}$ and ${(IE)}_{2}$ values?

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$\begin{array}{lll} (IE)_{1} (IE)_{2} \\ Y 100 110 \end{array}$

$\begin{array}{l} (IE)_{1} (IE)_{2} \\ Z 195 500 \end{array}$

$\begin{array}{l} (IE)_{1} (IE)_{2} \\ M 200 250 \end{array}$

$\begin{array}{lll} (IE)_{1} (IE)_{2} \\ Y 95 120 \end{array}$

answer is C.

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Detailed Solution

As a result of the development of an octet when one electron is taken out, alkali metals have extremely high values of ${(IE)}_{2}$ . ${(IE)}_{2}$ hence needs to be much higher than $(IE)_{1}$ .

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