As an ion chromatography chemist I made this one up: Anions aren't negative, they're just misunderstood.
 1918
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Q: What did the scientist say when he found 2 isotopes of helium? A: HeHe
 979
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A proton and a neutron are walking down the street. The proton says, "Wait, I dropped an electron help me look for it." The neutron says "Are you sure?" The proton replies "I'm positive."
 2280
3  

Q: Did you hear oxygen went on a date with potassium? A: It went OK.
 1344
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Q: What is the chemical formula for "banana"? A: BaNa2
 836
0