Thorium, symbol Th, is a radioactive metal like element
             with a atomic number of 90. It is part of the actnide series
             of the periodic table. Thorium was discovered in 1828 by
             Baron Jons Jakob Berzelius, a Swedish chemist.Its is ranked
             39 in quantites of elements in the earths crust. Thorium is
             dark, slowly attacked by water, and soluble in acids such
             Thorium has isotoped that range from 212 to236 in mass
             numbers. Thorium 232 happens naturally and is the first
             member of the radioactive-decay series.It is currently being
             studied as a potential atomic-fuel source for the future,
             which is called the thorium-uranium fuel cycle.It is
             hopefully going to be a substitute for the uranium-plutonium
             fuel cycle.Thorium metal is used im magnesium alloys and as
             a stabilizing component of electronic tubes. Thorium oxide
             is used in light filiments and electrodes and also in a
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