Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements.
The gold cage, with gemlike triangular facets, is the metallic equivalent of buckyballs, molecules consisting of 60 carbon atoms in the shape of soccer balls that were discovered in 1995.
The hole is closely watched because the stratosphere's diaphanous layer of ozone -- molecules consisting of three oxygen atoms -- absorbs ultraviolet rays, which could contribute to skin cancers and cataracts and threaten agriculture and ecosystems if they reached the surface.
Ismael Diez-Perez of Arizona State University and collaborators developed a method of synthesizing molecules consisting of 13 linked benzene rings, which could lead to nanometre-scale FETs.
For instead of the methane molecule, with its single carbon atom, he may work with hydrocarbon molecules consisting of many carbon atoms, arranged in rings or chains, and with side chains or branches, any of which may hold to themselves with chemical bonds not merely atoms of hydrogen or chlorine but also a wide variety of chemical groups.
In the early '30s molecules consisting of long-chain alkylaryl sulfonates (with benzene as the aromatic nucleus and the alkyl portion made from a kerosene fraction) appeared on the market in the United States.
These measurements later led to the detection, by radioastronomy, of chainlike molecules consisting of 5 to 11 carbon atoms in interstellar gas clouds and in the atmospheres of carbon-rich red giant stars.
In the late 1920s and early '30s, molecules consisting of long-chain alcohols were sulfonated and sold as the neutralized sodium salts without any further additions except for sodium sulfate as an extender.
Covalently bonded molecules consisting of nonmetal atoms and carbon compounds with no aromatic rings or conjugated chains have all their inner orbitals fully occupied with electrons, and for the majority of them the first unoccupied MOs tend to lie at considerably higher energies than in visibly coloured compounds.
Isoprene, either alone or in combination with other unsaturated compounds (those containing double and triple bonds), is used principally to make polymeric materials (giant molecules consisting of many small, similar molecules bonded together) with properties dependent upon the proportions of the ingredients as well as the initiator (substance that starts the polymerizing reaction) employed.
As an analogue to chemical molecules consisting of atoms, such arrangements are called dot molecules (DM).
