Ok, I'm not exactly a chem major, but I know my elements well enough to tell you how many of them exist in a chemical compound.

I was watching millionare, and the question was "Which of these chemicals contains more than 2 elements in it..."

The obvious choice from the get-go was hydrogen peroxide. She chose arsenic. She left with $1000 dollars...which is nothing to sneer at, but had she not been stupid, she could have left with at least $16,000.