hydrogen

Definition

The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.

Etymology

From French hydrogène, coined by Louis-Bernard Guyton de Morveau and Antoine Lavoisier, from Ancient Greek ὕδωρ (húdōr, “water”) + γεννάω (gennáō, “I bring forth”). Corresponding to hydro- + -gen.

Example Sentences

• "Our professor then reminded us that a hydrogen ion is merely a proton, and thus we should think about acid-base theory as we consider this problem further."
• "It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars."
• "Each carbon of the ring has one hydrogen attached except for the fourth one, which is bonded to a substituent."

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