Noun
any of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium)
Source: WordNetalkaline earth metal
As with magnesium salts and other alkaline earth metal salts, to some degree soluble in water. Source: Internet
In the periodic table, it appears to the right of the alkaline earth metal barium and to the left of the lanthanide cerium. Source: Internet
Characteristics Radium is the heaviest known alkaline earth metal and is the only radioactive member of its group. Source: Internet
In late 1938 they found evidence of isotopes of an alkaline earth metal in their sample. Source: Internet