s-block element which cannot be qualitatively | vedclass

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(D) The flame test is used to identify elements based on the characteristic color they impart to the flame.$Li$ (Lithium) gives a crimson red color.$N

Vedclass · Accepted Answer

$Be$

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(D) The flame test is used to identify elements based on the characteristic color they impart to the flame.$Li$ (Lithium) gives a crimson red color.$Na$ (Sodium) gives a golden yellow color.$Rb$ (Rubidium) gives a red-violet color.$Be$ (Beryllium) and $Mg$ (Magnesium) do not impart any characteristic color to the flame because their ionization energy is very high,and the energy of the flame is not sufficient to excite their electrons to higher energy levels.Therefore,$Be$ cannot be confirmed by the flame test.

$s-$block element which cannot be qualitatively confirmed by the flame test is ..... .

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