- any of the oxides of barium, radium, strontium, calcium, and, sometimes, magnesium.
Origin of alkaline earth
Examples from the Web for alkaline earth
Historical Examples of alkaline earth
What properties have the alkaline-earth metals in common with the alkali metals?
Like the alkaline-earth metals, their carbonates and phosphates are insoluble in water.
The alkaline-earth family consists of the very abundant element calcium and the much rarer elements strontium and barium.
They are called the alkaline-earth metals because their properties are between those of the alkali metals and the earth metals.
Unlike both the alkali and alkaline-earth metals, their hydroxides are nearly insoluble in water.
- Also called: alkaline earth metal, alkaline earth element any of the divalent electropositive metals beryllium, magnesium, calcium, strontium, barium, and radium, belonging to group 2A of the periodic table
- an oxide of one of the alkaline earth metals
- The oxides of calcium, strontium, radium, and barium, and sometimes magnesium.