Periodic Table Precipitation

[SaintJude]

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Apart from transition metals, which groups on the periodic table precipitate in elemental form?

 

[SaintJude]

Why I am asking is b/c Q bank had a question where one of the answer choices stated

"Calcium & Magnesium precipitate in elemental form to leave a white residue." This answer choice is false.

Well, calcium and magnesium do not precipitate in elemental form b/c they are most stable as positively charged ions. Like all alkaline earth metals they prefer to be in a +2 oxidation state.

Alkaline earth metals do not precipitate in elemental form. Is this info that we need to know?

 

[chiddler]

Ions will not spontaneously be ejected out of solution unless they can form a solid precipitate. I think this is obvious enough that this is not what the question is asking.

Need more context =/