| 1. | The alkali metals and the alkaline earth metals all form saline hydrides.
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| 2. | :: Sulfates of the Alkaline Earth elements are generally insoluble in water.
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| 3. | Calcium is a soft gray Group 2 alkaline earth metal, crust.
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| 4. | The next two elements, alkali and alkaline earth metal respectively.
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| 5. | For alkali and alkaline earth metals the M + Ar 4 cluster is tetrahedral.
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| 6. | For alkali and alkaline earth metals the M + Ne 4 cluster is tetrahedral.
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| 7. | The alkaline earth metals form difluorides that are insoluble.
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| 8. | All the discovered alkaline earth metals occur in nature.
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| 9. | In contrast, the alkaline earth chlorides are readily soluble.
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| 10. | Gaseous radium chloride exists as RaCl 2 molecules, as with other alkaline earth metal halides.
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