magnesium

a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)

इसमें 95% एल्युमिनियम , 4% कापर , 0.5% मैंगनीज तथा 0.5% मैंग्नेसियम होता है।

Beryllium, magnesium, calcium, strontium, barium and radium are alkaline earth metals.