COMMON METAL
-
copper and aluminum
-
lead and Zinc
-
Tin nickel
-
iron and magnesium
Minor METALS
RARE METAL
-
rare earth metal
- Lanthanum
- cerium
- praseodymium
- neodymium
promethium - samarium
- europium
- gadolinium
- Terbium
- dysprosium
- holmium
- erbium
- thulium
- ytterbium
- lutetium
- scandium
- yttrium
-
Other Rare Metalsl
- Tantalum
- cesium