Which of the following is not a characteristi | vedclass

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(D) Barium $(Ba)$ is an alkaline earth metal. $1$. It is a silvery-white metal. $2$. It forms $Ba(NO_3)_2$,which imparts a characteristic apple-green

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Its ionization potential is lower than radium $(Ra)$.

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(D) Barium $(Ba)$ is an alkaline earth metal. $1$. It is a silvery-white metal. $2$. It forms $Ba(NO_3)_2$,which imparts a characteristic apple-green color to flames,used in fireworks. $3$. Ionization potential decreases down the group. Since $Ba$ is above $Ra$ in Group $2$,$Ba$ has a higher ionization potential than $Ra$. Therefore,the statement that its ionization potential is lower than radium is incorrect. $4$. Barium does not exhibit significant photoelectric effect under visible light compared to more reactive elements like cesium.

$A$. $Be$	$I$. $1.74$
$B$. $Mg$	$II$. $1.84$
$C$. $Ca$	$III$. $2.63$
$D$. $Sr$	$IV$. $1.55$

Which of the following is not a characteristic of barium $(Ba)$?

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