Nov 11, 2025 · Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements. All the matter in the universe is composed of the …

chemical compound, Any substance composed of identical molecules consisting of atoms of two or more elements. Millions are known, each unique, with unique properties.

Nov 11, 2025 · Chemical compounds may be classified according to several different criteria. One common method is based on the specific elements present. For example, oxides contain one …

Adrenochrome, unstable chemical compound formed by the oxidation of epinephrine (also known as adrenaline) and having the chemical formula C9H9NO3. Its name is a combination of the …

6 days ago · sodium bicarbonate (NaHCO3), white crystalline or powdery solid that is a source of carbon dioxide and so is used as an ingredient in baking powders, in effervescent salts and …

Nov 26, 2025 · Alcohol, any of a class of organic compounds with one or more hydroxyl groups attached to a carbon atom of an alkyl group. Alcohols may be considered as organic …

Dec 2, 2025 · Caffeine, nitrogenous organic compound of the alkaloid group, substances that have marked physiological effects. Caffeine occurs in tea, coffee, guarana, maté, kola nuts, …

6 days ago · Sugar, any of numerous sweet, colorless, water-soluble compounds present in the sap of seed plants and the milk of mammals and making up the simplest group of …

Nov 14, 2025 · Salt, also called sodium chloride, mineral substance of great importance to human and animal health, as well as to industry. The mineral form halite, or rock salt, is sometimes …

Hydroxide, any chemical compound containing one or more groups, each comprising one atom each of oxygen and hydrogen bonded together and functioning as the negatively charged ion …