Why did the Mexican take Xanax? For hispanic attacks.

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If the Silver Surfer and Iron Man team up, they'd be alloys.

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An instructor in chemical warfare asked soldiers in his class: "Anyone knows the formula for water?" "Sure. That's easy," said one man. "What is it?" "H, I, J, K, L, M, N, O." "What, what?" reasked the instructor. "H to O," explained the chemistry expert.

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Q: What did the scientist say when he found 2 isotopes of helium? A: HeHe

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Two chemists go into a restaurant. The first one says "I think I'll have an H2O." The second one says "I think I'll have an H2O too" - and he died.

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