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alkaline-earth metal

noun

Pronunciation: ˈælkəlaɪn ɜːrθ ˈmɛtəl

Any of the six metallic elements that occupy group 2 of the periodic table, characterized by having two electrons in their outermost shell.

Beryllium is the lightest alkaline-earth metal in the periodic table.
Scientists study the reactivity of each alkaline-earth metal to understand their chemical properties.
Radium is a radioactive alkaline-earth metal that was historically used in luminous paints.

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