Radium

Radium is a chemical element, which has the symbol "Ra" and atomic number 88 (see the periodic table).

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Its appearance is almost pure white, but it blackens on exposure to air. Radium is an alkaline earth metal

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that is found in trace amounts in uranium ores. It is extremely radioactive. Its most stable isotope, Ra-226, has a half-life of 1602 years and decays into radon gas.

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The heaviest of the alkaline earth metals, radium is intensely radioactive and resembles Barium chemically. This metal is found (combined) in minute quantities in the uranium ore pitchblende, and various other uranium minerals. Radium preparations are remarkable for maintaining themselves at a higher temperature than their surroundings, and for their radiations, which are of three kinds: alpha rays, beta rays, and gamma rays. Radium also produces neutrons when mixed with beryllium.

Chemical element: A chemical element, often called simply element, is the class of atoms which contain the same number of protons....

Atomic number: The atomic number (Z) is a term used in chemistry and physics to represent the number of protons found in the nucleus of an atom. In an atom of neutral charge, the number of electrons typically equals the atomic number....

Periodic table: The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements. First created by Dmitri Mendeleev, the elements are arranged by electron configuration so that many chemical properties follow a regular pattern across the tabl...

Radium related Images and Photos (experimental)

Radium Shirt	Radium Babydoll	Radium Babydoll	Radium Babydoll
Domed Disc UFO Seen by Frank Slotta Near Radium Hot Springs British Columbia