Category:pl:Alkaline earth metals
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Polish terms for alkaline earth metals, chemical elements in group 2, which all have two valence electrons.
NOTE: This is a set category. It should contain terms for alkaline earth metals, not merely terms related to alkaline earth metals. It may contain more general terms (e.g. types of alkaline earth metals) or more specific terms (e.g. names of specific alkaline earth metals), although there may be related categories specifically for these types of terms.