Meaning & use
alkaline earth metal
Any of the six chemical elements in group 2 of the periodic table, including magnesium, calcium, and barium.
See it in a sentence
Calcium, an alkaline earth metal, is essential for building strong bones.
Alkaline earth metals react with water, though less vigorously than the alkali metals.
A note on using this word
Alkaline earth metals are reactive, silvery elements found in group 2, distinct from the more reactive alkali metals of group 1.
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