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Which alkaline earth metal is likely to best form an electride in liquid ammonia? Why?

Which alkaline earth metal is likely to best form an electride in liquid ammonia? Why?

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Answer #1

A free dissolved electron in solution is the smalest possible anion and is known as the elctride. The electron is highly solvated by the solvent like NH3. Alkaline earth metals are column two metals of the periodic table.

Based on studies, the smaller atoms, like alkali metal Li and alkaline earth metal Mg, are stronger electron donors than its larger peer Na and Ca. When the size is smaller, the solvent donor interactions is more. Solvation is vey strong in case of Mg. So, Mg is likely the best to form electride in NH3.

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