Dec 16, 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 atoms of …

chemical compound, Any substance composed of identical molecules consisting of atoms of two or more elements.

Dec 16, 2025 · Chemical compound - Elements, Molecules, Reactions: Chemical compounds may be classified according to several different criteria. One common method is based on the specific …

Dec 16, 2025 · Chemical compound - Bonding, Structure, Properties: The carbon atom is unique among elements in its tendency to form extensive networks of covalent bonds not only with other elements …

Chemical formula, any of several kinds of expressions of the composition or structure of chemical compounds. The forms commonly encountered are empirical, molecular, structural, and projection …

Jan 8, 2026 · Caffeine, nitrogenous organic compound of the alkaloid group, substances that have marked physiological effects. Caffeine occurs in tea, coffee, guarana, maté, kola nuts, and cacao.

Nov 11, 2025 · Chemical compound - Spectroscopy, Organic, Analysis: Until the mid-20th century, most organic compounds were distinguished from one another largely on the basis of simple physical and …

An organic compound is any chemical compound in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. The few carbon …

Jan 10, 2026 · Molecular shapes are of considerable importance for understanding the reactions that compounds can undergo, and so the link between chemical bonding and chemical reactivity is …

Jan 9, 2026 · Elements can combine with one another to form a wide variety of more complex substances called compounds. The number of possible compounds is almost infinite; perhaps a …