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What is an Alkali Metal and an Alkaline-earth Metal?
Element in the first group have one outer shell electron and are extremely reactive- Alkali Metal
any of the elements beryllium, magnesium, calcium, strontium, barium, and radium, occupying Group IIA (2) of the periodic table. They are reactive, electropositive, divalent metals, and form basic oxides that react with water to form comparatively insoluble hydroxides.- Alkaline earth Metal