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Ligand that exerts a strong crystal or ligand electrical field and generally forms low spin complexes with metal ions when possible.

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Dispersing Medium

The solvent-like phase in a colloid.

Amorphous Solid

A noncrystalline solid with no well-defined ordered structure.

Base

A substance that produces OH (aq) ions in aqueous solution. Strong soluable bases are soluble in water and are completely dissociated. Weak bases ionize only slightly.

yttrium

A rare trivalent metallic element, found in gadolinite and other minerals. Symbol: Y, at. wt.: 88.905, at. no.: 39, sp. gr.: 4.47. Cf."rare-earth element."

Yttrium has a silver-metallic luster and is relatively stable in air unless finely divided. Turnings of the metal, however, ignite in air if their temperature exceeds 400oC. Yttrium oxide is one of the most important compounds of yttrium and accounts for the largest use. It is widely used in making YVO4 europium, and Y2O3 europium phosphors to give the red color in color television tubes.

Radioactive Tracer

A small amount of radioisotope replacing a nonradioactive isotope of the element in a compound whose path (for example, in the body) or whose decomposition products are to be monitored by detection of radioctivity, also called a radioactive label.

Ionization

In aqueous solution, the process in which a molecular compound reacts with water and forms ions.

Diagonal Similarities

Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

Percent Composition

The mass percent of each element in a compound.

20 interesting chemistry facts

20 interesting chemistry facts.

Emulsion

Colloidal suspension of a liquid in a liquid.