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Refers to different atomic forms of all elements in contrast to ?isotopes?, which refer only to different atomic forms of a single element.

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Line Spectrum

An atomic emission or absorption spectrum.

Electrical Conductivity

Ability to conduct electricity.

Plasma

A physical state of matter which exists at extremely high temperatures in which all molecules are dissociated and most atoms are ionized.

Nuclides

Refers to different atomic forms of all elements in contrast to ?isotopes?, which refer only to different atomic forms of a single element.

Formula Unit

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

Ether

Compound in which an oxygen atom is bonded to two alkyl or two aryl groups, or one alkyl and one aryl group.

Homologous Series

A series of compounds in which each member differs from the next by a specific number and kind of atoms.

DP number

The degree of polymerization, the average number of monomer units per polymer unit.

Half-Reaction

Either the oxidation part or the reduction part of a redox reaction.

Hess' Law of Heat Summation

The enthalpy change for a reaction is the same whether it occurs in one step or a series of steps.

Heat of Condensation

The amount of heat that must be removed from one gram of a vapor at it's condensation point to condense the vapour with no change in temperature.

Ionization Isomers

Isomers that result from the interchange of ions inside and outside the coordination sphere.

Bonding Orbital

A molecular orbit lower in energy than any of the atomic orbitals from which it is derived, lends stability to a molecule or ion when populated with electron.

Organic Chemistry

The chemistry of substances that contain carbon-hydrogen bonds.

Faraday's Law of Electrolysis

One equivalent weight of a substance is produced at each electrode during the passage of 96,487 coulombs of charge through an electrolytic cell.

Amphiprotism

Ability of a substance to exhibit amphiprotism by accepting donated protons.

Period

The elements in a horizontal row of the periodic table.

Colligative Properties

Physical properties of solutions that depend upon the number but not the kind of solute particles present.

Ligand

A Lewis base in a coordination compound.

Absolute Entropy (of a substance)

The increase in the entropy of a substance as it goes from a perfectly ordered crystalline form at 0 °K (where its entropy is zero) to the temperature in question.

Entropy is a measure of the “dilution” of thermal energy.