chemical formula
Sign in to savecompact notation for chemical compounds giving element symbols and counts, including empirical formulas, molecular formulas, and condensed formulas
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A chemical formula is a shorthand way of writing what elements make up a substance and how many atoms of each are present. It matters because this compact notation lets scientists quickly communicate exactly what a chemical compound is made of, whether they're writing on paper, in a lab, or publishing research.
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A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name since it does not contain any words. Although a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulae can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than chemical names and structural formulae.