A precious metal trap is NOT a P trap design (nice trick question)
No, zinc is not a precious metal. It is a necessary industrial metal.
It is in common circulation, it has no precious metal content and is worth 5 cents.
iradium is the precious metal element apart from platinum
is brass a precious metal
Niobium is a rare metal, good additive for stainless, but not precious - it is grey
a lump of precious metal is called at nugget if talking about gold
Uranium is not a precious metal (as Au, Ag, Pt,.....) but is a valuable metal mined in Namibia.
Yes. Gold is an extremely precious metal. It is one of the most expensive metals there is.
Platinum, a precious metal, is used in catalytic converters.
No. Pewter is a cheap metal.
All metals are precious as they are a finite resource. However, precious refers to the abundance of a product, and thus there is still a plentiful supply of tin and thus it is not classed as a precious metal.