Respuesta :
Its (C) I guessed it and got it wrong just so I can give the answer away.
The alkaline earth metals have two electrons in their outermost shell which they lose to form cations.
- The given alkaline metals Beryllium, calcium, and magnesium have their valance electrons at different energy levels and have different densities.
- Moreover, the melting points of each of these metals are different from each other.
However, all these three metals form similar compounds when they react with molecular oxygen. Hence, the correct answer is option c.
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