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Solid triester of glycerol and (mostly) saturated fatty acids.

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Beta Particle

Electron emitted from the nucleus when a neuton decays to a proton and an electron.

Nonpolar Bond

Covalent bond in which electron density is symmetrically distributed.

ytterbium

A rare metallic element found in gadolinite and forming compounds resembling those of yttrium. Symbol: Yb, at. wt.: 173.04, at. no.: 70, sp. gr.: 6.96. Cf."rare-earth element."

 

Hydrate Isomers

Isomers of crystalline complexes that differ in whether water is present inside or outside the coordination sphere.

Periodic Law

The properties of the elements are periodic functions of their atomic numbers.

Bond Order

Half the numbers of electrons in bonding orbitals minus half the number of electrons in antibonding orbitals. Bond order gives an indication to the stability of a bond. Also defined as the difference between the number of bonding electrons and antibonding electrons divided by two.

Excited State

Any state other than the ground state of an atom or molecule.

Formula Unit

The smallest repeating unit of a substance. The molecule for nonionic substances

xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

Single Bond

Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.