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alkaline-earth metal |
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alkaline-earth metalAny of a group of six metallic elements with similar bonding properties: beryllium, magnesium, calcium, strontium, barium, and radium. They form a linked group in the periodic table of the elements. They are strongly basic, bivalent (have a valency of two), and occur in nature only in compounds. Calcium and magnesium are abundant on Earth and essential for all organisms, while the other three elements are relatively rare. |
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The mystery element is an alkaline earth metal, or one of a group
of elements that is highly reactive in nature. But he argues that placing
helium with the alkaline earth metals results in a more regularly shaped
structure that can take two forms. But this alkaline earth metal is more commonly found in
compounds (two or more elements that are chemically combined). |
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