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hydrogen atom

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Noun1.hydrogen atomhydrogen atom - an atom of hydrogen
hydrogen ion - a positively charged atom of hydrogen; that is to say, a normal hydrogen atomic nucleus
atom - (physics and chemistry) the smallest component of an element having the chemical properties of the element
acid hydrogen, acidic hydrogen - a hydrogen atom in an acid that forms a positive ion when the acid dissociates
deuterium, heavy hydrogen - an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)
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Precious-metal catalysts break the tight bond between the two hydrogen atoms in the gas, freeing them to move to various other molecules.
Together and apart by Science News
The two circles in the upper-left illustrate the universal time/length 'yardstick' of a hydrogen atom (don't ask).
Message in a bottle by Thrasher
The carboxyl hydrogen atom was placed in a position calculated from the coordinates of the donor and acceptor carboxyl oxygen atoms, but had no effect on the refinement.
Direct space structure solution applications by Tremayne, Maryjane / Journal of Research of the National Institute of Standards and Technology
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