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- Think Geek - thinkgeek.com
Fun with Chemistry: a Ferrous Wheel As seen on Big Bang Theory! Right. If you're checking out this shirt, you probably like corny chemistry jokes, so here's another for you: Two atoms walk into a bar. One atom stops and says to the other, "I think I just lost an electron." The second atom asks "Are you sure?" The first atom replies, "I'm positive!" *rimshot* A ring of ferrous ions (Fe+2) is printed in white on this 100% cotton, maroon shirt.