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A chemical compound is a substance composed of many identical molecules containing atoms from more than one element held together by chemical bonds. Learn about the history, types, definitions, and examples of chemical compounds, and how they can be transformed by chemical reactions.
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 more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds.
PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.
24 paź 2020 · A compound is a substance made of two or more elements chemically bonded in a fixed ratio. Learn how to write compound formulas, types of compounds, and the difference between compounds and molecules.
12 lip 2023 · The molecular formula of a covalent compound gives the types and numbers of atoms present. Compounds that contain predominantly carbon and hydrogen are called organic compounds, whereas compounds that consist primarily of elements other than carbon and hydrogen are inorganic compounds.
30 cze 2023 · Chemical compounds can generally be classified into two broad groups: molecular compounds and ionic compounds. Molecular compounds involve atoms joined by covalent bonds and can be represented by a variety of formulas.
Learn about chemical compounds and their classification, properties, and reactions from Britannica's editors. Find examples of common compounds, such as methane, asparagine, arginine, RNA, and acetylcholine.
