الوصف

 Rare light metal: Li, Rb, Cs and others
Rare Refractory Metal: Ti, Zr, Mo, W and others
Rare Scattered Metal: Ga, Im, Ge, Tl and others
Rare-earth Metal: Sc, Y, La, Ce and others
Radioactive Metal: Ra, Fr, Th and others
1. Light Metal: AL, Mg, K, Na, Ca, Sr and others
2. Heavy Metal: Cu, Ni, Co, Pb, Zn, Sn, Sb, Bi, Cd, Hg and others
3. Semimetal: Si, Se, Te, As, B and others
4. Rare Metals:1. Light Metal: AL, Mg, K, Na, Ca, Sr and others
2. Heavy Metal: Cu, Ni, Co, Pb, Zn, Sn, Sb, Bi, Cd, Hg and others
3. Semimetal: Si, Se, Te, As, B and others
4. Rare Metals: