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For questions about the alkali metals (group 1), their compounds, and their physical and chemical properties. For questions specifically about hydrogen, use tag [hydrogen] instead.

The alkali earth metals are six chemical elements in group 1 of the periodic table. They are lithium ($\ce{Li}$), sodium ($\ce{Na}$), potassium ($\ce{K}$), rubidium ($\ce{Rb}$), cesium ($\ce{Cs}$), and francium ($\ce{Fr}$).

Although hydrogen belongs to the same group, several of its properties do not match those of the alkali metals. Hence, should be used for such questions. Also see: Where hydrogen belongs in the Periodic Table

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