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A property that depends upon the amount of material in a sample.

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Covalent Bond

Chemical bond formed by the sharing of one or more electron pairs between two atoms.

Critical Temperature

The temperature above which a gas cannot be liquefied, the temperature above which a substance cannot exhibit distinct gas and liquid phases.

Alpha Particles

A helium nucleus.

Ideal Gas

A hypothetical gas that obeys exactly all postulates of the kinetic-molecular theory.

 

yttria

Y2O3: A white, water-insoluble powder, Y2O3, used chiefly in incandescent gas and acetylene mantles.

Square Planar Complex

Complex in which the metal is in the center of a square plane, with ligand donor atoms at each of the four corners.

Homologous Series

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

Periodic Table of Elements

An arrangement of elements in order of increasing atomic numbers that also emphasizes periodicity.

Boiling Point

The temperature at which the vapor pressure of a liquid is equal to the applied pressure, also the condensation point

Excited State

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