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A hydrogen bond is the attractive interaction of a hydrogen atom covalently bonded to a very electronegative atom, such as nitrogen, oxygen or fluorine, to another very electronegative atom in another molecule.

The interaction is essentially electrostatic between the small positive charge on the hydrogen atom and the slight negative charge on the N, O or F atom in the other molecule.

Examples are the hydrogen bonding in liquid water, alcohols, ammonia and also in solids, ice, solid hydrogen fluoride.

In larger molecules that have the right shape the hydrogen bonding can occur within the molecule between a hydrogen atom covalently bonded to a very electronegative atom, such as nitrogen, oxygen and a very electronegative atom in another part of the molecule.

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12y ago

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