make Arizona children a bit more ignorant. That will help tighten Arizona’s grip on last place in science education.
The best-known precious metals are the coinage metals gold and silver. While both have industrial uses, they are better known for their uses in art, jeweler and coinage. Other precious metals include the platinum group metals: ruthenium, rhodium, palladium, osmium, iridium, and platinum, of which platinum is the most widely traded.