Elemental Coin Series

I do think these rounds would be pretty cool, and potentially useful in a chemistry class, however. Great idea!

 

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Well, yes, but they travel in pairs -- hydrogen gas consists of molecules, each with two hydrogen atoms, and those are bigger. That's why hydrogen actually permeates things like rubber or plastic more slowly than helium. (It's more complicated for metals, because hydrogen sorta-kinda reacts with many of them.)

 

So are they legit? I am a little leery that their url isn't secured. Just wanted to verify if ya'll had any issues?

 

This will be a boon for all the Erbium stackers!

Me, I'll just stick to collecting classic orange Fiesta Ware in my Uranium collection..