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The oxide of a metal that reacts with water to form a base.

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Halogens

Group VIIA elements: F, Cl, Br, I

Varieties of garnet minerals

The most famous type of garnet stone is pyrope (flaming). This is the "oldest of garnets", with a dense red color, similar to the grain of an edible garnet. Pyrope has a variety called rhodolite - a stone of dense pink or pink-purple color, which sometimes has the alexandrite effect and is used in elite jewelry.

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

D-Orbitals

Beginning in the third energy level, aset of five degenerate orbitals per energy level, higher in energy than s and p orbitals of the same energy level.

 

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.

Cathode

Electrode at which reduction occurs in a cathode ray tube, the negative electrode.

Radioactivity

The spontaneous disintegration of atomic nuclei.

Peroxide

A compound containing oxygen in the -1 oxidation state. Metal peroxides contain the peroxide ion, O22

Vapor

A gas formed by boiling or evaporating a liquid.

Electronic Transition

The transfer of an electron from one energy level to another.