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English word hydrogen comes from Ancient Greek γεννάω, Ancient Greek ὕδωρ, and later French hydrogène (Hydrogen.)
γεννάω (Ancient Greek)
ὕδωρ (Ancient Greek)
hydrogène (French)
Hydrogen.
hydrogen (English)
The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794.. A sample of the element.. An atom of the element.. Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature.