A formula unit in chemistry is the empirical formula of an ionic or covalent network solid compound used as an independent entity for stoichiometric calculations. Examples include ionic NaCl and K2O and covalent networks such as SiO2 and C (as diamond or graphite). // Introduction Chemistry is a large field encompassing many subdisciplines that often overlap with significant portions of other sciences. ... In chemistry, the empirical formula of a chemical is a simple expression of the relative number of each type of atom (called a chemical element) in it. ... From ancient Greece (Ionic) An Ionian is a member of one of the four great divisions of the ancient Greek people. ... Covalent bonding is a form of chemical bonding characterized by the sharing of one or more pairs of electrons between atoms, in order to produce a mutual attraction, which holds the resultant molecule together. ... In chemistry, stoichiometry is the study of the combination of elements in chemical reactions. ... A scattering of round-brilliant cut diamonds shows off the many reflecting facets. ... Graphite (named by Abraham Gottlob Werner in 1789, from the Greek γÏαφειν: to draw/write, for its use in pencils) is one of the allotropes of carbon. ...
formula weight, in chemistry, a quantity computed by multiplying the atomic weight atomic weight, mean (weighted average) of the masses of all the naturally occurring isotopes of a chemical element, as contrasted with atomic mass, which is the mass of any individual isotope.
The smallest unit of an element is the atom.
If the formula used in computing the formula weight is the molecular formula, the formula weight computed is the molecular weight molecular weight, weight of a molecule of a substance expressed in atomic mass units (amu).
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