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alkaline earth metals
These are the second group on the left of the Periodic Table, IIA, which include beryllium, magnesium, calcium, strontium, barium, and radium.
When these elements are combined with oxygen or water, they form compounds with a basic pH.
Alkaline earth metals are not very electronegative. They have just two valence electrons, and will lose them to become positively charged ions or cations.