hydrogen atom

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Noun1.hydrogen atom - an atom of hydrogenhydrogen 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)
References in periodicals archive ?
Any ultraviolet photons that escaped from the earliest galaxies would have been absorbed by a neutral hydrogen atom on the journey to Earth.
During the splitting process, a mineral called serpentine is formed when the olivine mineral strips one oxygen and hydrogen atom from an H2O molecule to release the spare hydrogen atom.
As the simplest example, we consider a hydrogen atom in the Earth gravitational field, where we take into account only kinetic and Coulomb potential energies of an electron in a curved spacetime.
The solid plasticizer comprises at least two different benzotriazole derivatives selected from compounds represented by following formula: R1 is one of a hydrogen atom, a halogen atom and an alkyl group; m is an integer of one to four; and X is one of a hydrogen atom, an alkyl group, an aryl group, an aralkyl group and a group represented by following formula: R2 is one of a hydrogen atom, a halogen atom, an alkyl group and hydroxyl group and n is an integer of one to five.
Summary: Certain embodiments of the present invention provide a tire component comprising a vulcanized rubber, and from about 3 to about 85 parts by weight, per 100 parts by weight rubber, of a filler dispersed within said vulcanized rubber, where the vulcanized rubber includes the vulcanized residue of a thermoplastic-elastomeric block copolymer defined by the formula [alpha]-[pi]-[theta]-[omega] where [alpha] is a hydrogen atom or a functional group, [pi] includes an elastomeric block, [theta] includes a thermoplastic block and [omega] includes a hydrogen atom or a functional group.
Instead, two carbon atoms are connected by a double bond without a hydrogen atom in between.
The company said the C60 molecule is the "roundest and most symmetrical large molecule known to man," and is able to absorb "large numbers of hydrogen atoms -- almost one hydrogen atom for each carbon atom.
The two circles in the upper-left illustrate the universal time/length 'yardstick' of a hydrogen atom (don't ask).
The hydrogen atom remains an attractive reagent for studying this reaction; its simplicity negates any cumbersome steric and electronic considerations.
The hydrogen atom is the most basic atom from the point of view of atomic structure theory.
Polypropylene is formed of linked carbons, the first linked to two hydrogen atoms, the second to a hydrogen atom and a methyl group (C[H.
This in turn makes it appear that water particles are not made up of one hydrogen atom and one oxygen atom, as Dalton had thought, but may be made up, at the simplest, of two hydrogen atoms and one oxygen atom.