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what do alkali metals and alkaline earth metals have in common? how are they different?

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Answer: Alkali metals and alkaline earth metals both have chemical reactivity to air and water.

Alkali are in group 1 of the periodic table. Alkaline earth metals are in in group 2 of the periodic table. The main difference between alkaline and alkali is that alkali metals have one valence electron, when alkaline earth metals have two valence electrons.

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