Platinum

Platinum is a dull silver metal, most well known for it's resistance to corrosion. It is known as a "Noble metal", similar to the Noble Gases, because it does not react much with anything.

Atomic name is Pt, atomic number is 78 (Right before Gold, which is similar in many respects) and atomic weight is 195. It's electron configuration is 2, 8, 18, 32, 17, 1.

Platinum is most times used for it's resistance to corrosion, and has long been used for jewelry and certain scientific components that require something that will not corrode or rust away after much use. Fuel cells, which mix Hydrogen and Oxygen into water and create electricity as a byproduct, are known to be expensive because the metal that touches these two gases must not corrode in the presents of pure oxygen, so most times, is Platinum.

Some very old light bulbs used Platinum wire to seal through glass, because it bonded well to glass and expanded the same amount as the glass, but this method isn't used due to the price of Platinum. As I write this the price of one ounce(an ounce is about the weight of 6 US nickel coins) of Platinum is over $1,500 , higher than the price of Gold per ounce which is currently just below $1,200.

This is my Platinum sample. The wire is actually Platinum-plated Nickel, as this much pure platinum might cost over $50. These two wires, if un-coiled, are about 6 inches long, and the whole foot of Platinum-plated Nickel wire cost me about $10. I used these in a fuel cell project, because as mentioned above, Platinum works far better than most other metals in this application. There is probably less than 2 mg (milligrams, 1/1000th of a gram, a US nickel weighs 5 grams) of platinum in this whole picture, but hey, I can say I own a few million atoms of it.

Thanks,

~Ben

News: I got a Geiger Counter in the mail today, which is a device to sense radioactivity. It is a kit, and I can't assemble it without a bit of help, but once I get it going I'll do a post on radioactive Thorium.