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
 

