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| al·ka·line-earth met·al (plural al·ka·line-earth met·als) or al·ka·line earth (plural al·ka·line earths) |
noun |
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| Definition: |
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metallic element: a metallic element belonging to group 2 of the periodic table, either beryllium, magnesium, calcium, strontium, barium, or radium, characterized by having a valence of two
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