Hey, have you ever heard of the sacagawea dollar coin?
Yeah but what about, it's just a dollar coin right ?
No it's not just a dollar coin! Theirs so many interesting things that you don't know about it like how the president signed into law the sacagawea coin.
Uhhh.... I really don't know anything about the coin but if you buy me lunch you can tell me about it, fair ?
Okay fine, well did you know on one side there is and eagles and on the other side there is sacagawea, and the design is one of Glenna Goodacre.
The proccess of gettting this coin from a idea to a real thing took many commiettys and designers to diside which one to use.
That's cool and all but I'm more interested in what the coin is made out of, do you know that ?
Uh heck yeah I do, I'm an expert it contains about 77% copper (Atomic number 29 & Atomic mass of 63.5), 12% zinc ( Atomic number 30 & Atomic mass of 65), 7% manganese (Atomic number of 25 & Atomic mass 55), and 4% nickel (Atomic number of 28 and Atomic mass of 59).
Where do those metals come from?
Copper is found free in nature and is a transition metal, one of the worlds largest copper mines is in Chile. Zinc is found free in nature is a transition metal and the largest mine is India. Manganese isn't found free in nature and is extracted from oxides is a Transition metal and is found in Australia. Nickel is a transition metal and is naturally occurring and is found in Russia.
With all those metals how long do you think the coin will last?
A dollar coin lasts about 30 years before its no longer usable on average then it's returned to the mint to be recycled.
Well now I know all I could ever wish to know about the dollar coin thanks!