More info about hydrogen bond: http://bioweb.wku.edu/courses/Biol220/chembond/HBondMFLO.html

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hydrogen bond has definition bond formed between
hydrogen bond has definition opposite partial charges
hydrogen bond has definition of polar molecules
hydrogen bond has example H20 - H20 bond, H to O
hydrogen bond can be formed from oxygen atom
hydrogen bond can be formed from hydrogen atom
hydrogen bond type of bond