Although quite different, beryllium, magnesium, calcium, strontium, barium, and radium are all classified as what type of metals?
acidic earth metals
mucous earth metals
detergent earth metals
alkaline earth metals
The Alkaline Earth Metals The alkaline earth metals are beryllium, magnesium, calcium, strontium, barium, and radium. Beryllium, strontium, and barium are rather rare, and radium is unstable and highly radioactive. In contrast, calcium and magnesium are the fifth and sixth most abundant elements on Earth, respectively; they are found in huge deposits of limestone and other minerals.