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ing the smallest portion of any particular compound that can exist in a free state; as, a molecule of water consists of two atoms of hydrogen and one of oxygen. Cf. Atom.

A colorless liquid, C4H8O2, obtained by condensation of two molecules of acetaldehyde: CH3CHO + CH3CHO = H3CH(OH)CH2CO; also, any of various derivatives of this. The same reaction has been applied, under the name of aldol condensation, to the production of many compounds.

uminium and some other element (esp. an alkali metal) or of aluminium. It has twenty-four molecules of water of crystallization.

cal, NH2, not yet obtained in a separate state, which may be regarded as ammonia from the molecule of which one of its hydrogen atoms has been removed; -- called also the amido group, and in composition represented by the form amido.

An ultimate particle of matter not necessarily indivisible; a molecule.

attraction; equivalence; valence; also (a later use) the number of atoms in an elementary molecule. See Valence.

ormula is provisionally accepted as representing the probable constitution of the benzene molecule, C6H6, and as the type on which its derivatives are formed.

Containing two atoms or equivalents of carbon in the molecule. [Obs. or R.]

Pertaining to, or formed from, two molecules; as, a bimolecular reaction (a reaction between two molecules).

A sulphide having two atoms of sulphur in the molecule; a disulphide, as in iron pyrites, FeS2; -- less frequently called bisulphuret.

f the changes which they undergo in consequence of alterations in the constitution of the molecules, which depend upon variations of the number, kind, or mode of arrangement, of the constituent atoms. These atoms are not assumed to be indivisible, but merely the finest grade of subdivision hitherto attained. Chemistry…

A minute particle; an atom; a molecule.

o form complex compounds. The name is also applied to the univalent radical, CN (the half molecule of cyanogen proper), which was one of the first compound radicals recognized.

A name given by Haüy to the successive diminution of the layers of molecules, applied to the faces of the primitive form, by which he supposed the secondary forms to be produced.

A compound containing in the molecule two atoms of hydrogen united with some other element or radical. [Obs.]

A compound containing in the molecule two atoms of oxygen united with some other element or radical; -- usually called dioxide, or less frequently, binoxide.

Having two atoms or equivalents of calcium to the molecule.

An oxide containing two atoms of oxygen in each molecule; binoxide.

A selenide containing two atoms of selenium in each molecule.

The process of separation, or the condition of being separate, as of the molecules of a body.