A nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe.
Dutch: hydrogeen, hydrogenium, waterstof
Polish: H, wodór
A unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second.
Polish: H, henr
The constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second.
synonym: Planck's constant.
The 8th letter of the Roman alphabet.
thermodynamics A thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure:
— Enthalpy is the amount of energy in a system capable of doing mechanical work.
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